DIGITAL REALTY TRUST, INC. TO ACQUIRE LAKESIDE TECHNOLOGY CENTER

Historic Property is Chicago's Premier Internet Gateway and Data Center

Menlo Park, Calif. -- March 22, 2005 - Digital Realty Trust, Inc. (NYSE: DLR) today announced that the Company's operating partnership has agreed to purchase Lakeside Technology Center for approximately $142.6 million in cash which includes fees payable to the seller in connection with its ongoing efforts to obtain a change in the real estate tax classification of the property. The seller can earn an additional contingent fee of up to $20 million by obtaining the new real estate tax classification prior to December 31, 2006. The purchase price and contingent fee, if applicable, is expected to be funded from borrowings under the operating partnership's unsecured credit facility, or a combination of borrowings under the credit facility and secured long-term debt.

Located in Chicago, the property is an 8-story building comprising a total of approximately 1,095,540 square feet, including approximately 820,540 net rentable square feet and approximately 275,000 square feet of vacant space in shell condition held for redevelopment. The property is approximately 72% leased, or 96% leased excluding the vacant shell space held for redevelopment. The property is expected to generate an initial year unleveraged cash cap rate of approximately 9.0%.

The purchase of the property is subject to numerous conditions, including the satisfactory conclusion by our operating partnership of its due diligence review of the property during a due diligence period ending on April 13, 2005. During the due diligence period, the Company's operating partnership has the right to terminate the purchase and sale agreement for any reason or for no reason.

As one of the premier Internet gateway and data centers in Chicago, Lakeside Technology Center is home to several national telecom service providers and data center operations for corporate tenants. The property provides a secure operating environment with infrastructure critical to tenants' day-to-day operations. Tenants benefit from the robust data center environment including ample and redundant power supplies, efficient HVAC services, and extensive conduit and riser space. Lakeside Technology Center, which is on the historic register, is a noted Chicago landmark that was completely renovated in 1999 - 2000 to create a modern data center facility while preserving the historical stature of the building.

Lakeside Technology Center also contains a centrally-located meet-me-room and collocation facility, which speeds time to market for customers and provides multiple network choices, enhanced reliability, and capital efficiency for telecom carriers and network service providers.

"Lakeside Technology Center is one of the premier Internet gateways in the region and fits extremely well with our current asset base and business strategy," said Michael Foust, Chief Executive Officer of Digital Realty Trust. "We are very excited to be in the Chicago market, which is the major hub for commerce and telecom network traffic for the Midwest. Our acquisition of Lakeside Technology Center will provide us with a fantastic opportunity to provide space to leading technology and corporate data center tenants who require the mission critical infrastructure necessary to operate their businesses without interruption."

About Digital Realty Trust, Inc.
Digital Realty Trust, Inc., traded on the New York Stock Exchange under the ticker symbol "DLR", owns, acquires, repositions and manages technology-related real estate. The Company's 24 properties contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate data center tenants. Comprising approximately 5.6 million net rentable square feet, Digital Realty Trust's property portfolio is located throughout the United States, with one property located in London, England. For additional information, please visit the Company's website at www.digitalrealtytrust.com.

DOUBLECLICK TO EXPAND OPERATIONS
TO ADDITIONAL EQUINIX INTERNET HUBS

Leading Provider of Online Marketing Tools to Double IT Infrastructure Deployment at Equinix with Operations in Five IBX Centers

Foster City, CA and New York, NY / March 7, 2005 / Equinix, Inc. (Nasdaq: EQIX) - the leading provider of network-neutral data centers and Internet exchange services, and DoubleClick Inc. (Nasdaq: DCLK), the leading provider of marketing solutions for ad agencies, marketers and Web publishers, today announced that DoubleClick will increase the company,s IT infrastructure deployments at Equinix Internet Business Exchange' (IBX(R)) centers.

DoubleClick offers a variety of technology-based solutions that rely upon a solid network connectivity infrastructure for their delivery, such as online advertising, search engine marketing, affiliate marketing, email marketing, database marketing, data management and marketing resource management. In addition, the company requires a robust communications platform for the rapid and reliable exchange of data between the company,s 22 offices around the world.

The new agreement with Equinix will enable DoubleClick to expand operations to additional Equinix IBX centers, where it will directly connect to a critical mass of leading Internet companies, including all of the top carriers, networks and ISPs. To facilitate this interconnection, DoubleClick will utilize Equinix GigE Exchange', a service that provides an efficient central switching fabric to create links between the aggregation of companies operating in Equinix's centers. By centralizing network connectivity operations within Equinix's Internet hubs, DoubleClick can avoid the cost and complexity of reaching its network service provider partners in multiple locations and across great distances. It can also eliminate intermediate network backbones by establishing a more direct route between packet origin and destination, bringing content closer to end-users and enhancing performance.

Equinix's premium data center and exchange services provide a redundant and secure infrastructure for content intensive organizations to base their operations. The power operations of each center include a high-performance backup system that ensures uninterrupted power even in the event of utility power disruption. Equinix's HVAC systems provide industry-leading environmental control, including the ability to accommodate the latest in high power density equipment such as blade servers. Security features include interlocking "mantrap" doors, multiple layers of biometric hand-geometry scanners controlling access, as well as 24-hour security officers and hundreds of surveillance cameras.

"After a strong relationship over the past two years, Equinix has become a strategic partner in DoubleClick,s day-to-day operations," said Greg Tagaris, VP of Operations for DoubleClick. "Equinix provides a high-performance platform with a unique aggregation of the networks that we rely upon to support the delivery of our services to customers, along with an exceptional level of customer support."

"As a visionary leader in electronic marketing, DoubleClick has quickly grown and placed increasingly more emphasis on the infrastructure that supports the reliable and expedient delivery of their electronic services," said Peter Van Camp, CEO of Equinix. "Equinix GigE Exchange is an important part of that infrastructure by providing a convenient and centralized platform on which to interact with an aggregation of networks."

About DoubleClick Inc.
DoubleClick is the leading provider of solutions for advertising agencies, marketers and web publishers to plan, execute and analyze their marketing programs. DoubleClick's marketing solutions - online advertising, search engine marketing, affiliate marketing, email marketing, database marketing, data management and marketing resource management - help clients yield the highest return on their marketing dollar. In addition, the company's marketing analytics tools help clients measure performance within and across channels. DoubleClick Inc. has global headquarters in New York City and maintains 23 offices around the world.

About Equinix
Equinix is the leading global provider of network-neutral data centers and Internet exchange services for enterprises, content companies, systems integrators and network services providers. Through the company's 15 Internet Business Exchange' (IBX(R)) centers in five countries, customers can directly interconnect with every major global network and ISP for their critical peering, transit and traffic exchange requirements. These interconnection points facilitate the highest performance and growth of the Internet by serving as neutral and open marketplaces for Internet infrastructure services, allowing customers to expand their businesses while reducing costs.