Limelight Networks® to Provide Consulting and Content Delivery Services for Microsoft Silverlight 3

TEMPE, AZ, 10 July 2009 — Limelight Networks, Inc. (NASDAQ: LLNW) announced today support for Microsoft Silverlight 3, the next-generation streaming platform unveiled today at the Silverlight 3 and Expression 3 Launch event in San Francisco. Limelight plans to make Silverlight 3 available as part of the company’s on-demand and live event content delivery products. Additionally, Limelight’s professional services organization plans to offer turnkey consulting services to help publishers deploy successful Silverlight 3-based solutions.

“Microsoft Silverlight 3 and IIS Smooth Streaming will help change the way publishers create and deliver Web experiences, and Microsoft is pleased that Limelight Networks will help accelerate its adoption by making its professional services experience available to the Microsoft ecosystem,” said Eddie Amos, general manager of the Developer Division at Microsoft Corp. “Silverlight continues to see rapid adoption around the globe, and Microsoft is proud to continue its long-standing relationship with Limelight to ensure support for Silverlight 3 on its global content delivery service.”

Microsoft Silverlight 3 and IIS Smooth Streaming offer key features that will highlight support for higher quality video and audio, empower richer experiences and help improve Rich Internet Application productivity. When combined with the global presence and scale of Limelight Networks’ content delivery service, Silverlight 3 will help customers develop and deliver a consistent, broadcast-quality online experience to Internet video audiences around the world.

“Limelight Networks’ global content delivery service has offered support for Silverlight since its initial launch in 2007, and since that time, customers have selected our Silverlight implementation to deliver some of the largest events ever on the Internet. Today, entertainment and enterprise customers continue to choose Silverlight to create cost-effective, feature-rich Web experiences, and so we’re pleased to announce both service and consulting support for the next generation of Microsoft Silverlight,” said Peter Coppola, vice president, product management, Limelight Networks, Inc.

The Limelight Networks Professional Services group (LimelightPS) offers development, operational, and project management support to media, entertainment, and enterprise customers. Using best practices learned while delivering events such as the 2008 Summer Games, Limelight consultants can assist with Silverlight implementations of any size. Limelight’s services include designing architecture for scale, recommending best of breed differentiated user interfaces, suggesting proven methods to minimize costs, and most importantly, ensure that customers’ Silverlight-based solutions are delivered flawlessly. For more information about LimelightPS solutions, visit http://www.limelightnetworks.com/limelightps.htm.

Through its content delivery service, Limelight Networks today provides support for Microsoft Silverlight including advanced technologies such as Smooth Streaming and Deep Zoom.