Digital Realty Trust Announces New Turn-Key Datacenter Lease Agreement with Yahoo!

San Francisco, CA – Digital Realty Trust, Inc. (NYSE: DLR), a leading owner and manager of corporate and Internet gateway datacenters, has completed a Turn-Key Datacenter™ lease agreement with Yahoo!, Inc. As part of the agreement, Yahoo! will establish an advanced corporate datacenter in a Digital Realty Trust Turn-Key Datacenter™ facility and the two companies will target the project towards meeting the strict environmental standards of the highly respected LEED Gold certification.

The Leadership in Energy and Environmental Design (LEED) Green Building Rating System™ is the nationally accepted benchmark for the design, construction, and operation of high performance green buildings. LEED gives building owners and operators the tools they need to have an immediate and measurable impact on their buildings' performance. LEED promotes a whole-building approach to sustainability by recognizing performance in five key areas of human and environmental health: sustainable site development, water savings, energy efficiency, materials selection, and indoor environmental quality. Digital Realty Trust was the first company in the datacenter industry to achieve LEED Gold certification in recognition of a Chicago datacenter completed in 2007. This new datacenter continues Digital Realty Trust’s industry leadership in advancing the energy efficiency and reducing the environmental impact of datacenter facilities.

“Yahoo! is committed to being an environmentally responsible business.  We build our datacenters based on a rigorous analysis of key components such as geographical location, climates, building materials, cost performance, and use of alternative-energy systems,” said Kevin Timmons, Vice President of Operations at Yahoo!.

“We are very pleased to further our relationship with Yahoo! with this new Turn-Key Datacenter™ agreement,” said Chris Crosby, Senior Vice President of Digital Realty Trust. “. Yahoo! understands the value of green datacenters both in terms of the impact on the bottom line and its importance for corporate responsibility. It is great to work with a company that is taking such a forward-looking approach to its datacenter strategy.”

Digital Realty Trust Turn-Key Datacenter™ facilities provide state-of-the-art environments for supporting mission critical infrastructure, with advanced cooling, power, redundancy, and sustainability features to ensure that critical applications are available while optimizing energy efficiency. Digital Realty Trust’s Turn-Key Datacenters™ are scalable from hundreds of kilowatts of IT Load to megawatts of IT load and are located in markets throughout North America and Europe. Each Turn-Key Datacenter™ facility is physically secure and features a state-of-the-art power and cooling architecture that has been optimized for green operation. Every Turn-Key Datacenter™ is built using the company’s proprietary POD Architecture™ and uses metered power to ensure that clients pay only for the power that they use.

About Digital Realty Trust, Inc.
Digital Realty Trust, Inc. owns, acquires, redevelops, develops and manages technology-related real estate. The Company is focused on providing Turn-Key Datacenter™ and Powered Base Building™ datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and internet enterprises, to manufacturing and financial services. Digital Realty Trust's 71 properties, excluding one property held as an investment in an unconsolidated joint venture, contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise datacenter tenants. Comprising approximately 12.7 million square feet as of May 8, 2008, including 1.9 million square feet of space held for redevelopment, Digital Realty Trust's portfolio is located in 26 markets throughout Europe and North America. For additional information, please visit Digital Realty Trust's website at http://www.digitalrealtytrust.com.