Limelight Networks’ High Performance CDN Selected for Microsoft Digital Advertising Solutions (MDAS)

Supporting the Stable Distribution of Large-Sized Internet Advertisements

TOKYO, JAPAN – Jan. 29, 2008 – Limelight Networks (NASDAQ: LLNW), the leading content delivery network (CDN) for digital media, announced today that Microsoft Co., Ltd., Microsoft’s Japanese unit, has selected Limelight Networks’ high performance CDN for Microsoft Digital Advertising Solutions (MDAS).

Making effective use of Microsoft media such as major portal site MSN® and Windows Live(TM) integrated online services, MDAS uses innovative dynamic advertising techniques to lead the online advertising industry. Limelight Networks will distribute MDAS advertising campaign content containing both video and audio to Internet users.

Online advertising campaigns are attracting keen interest in recent years, and as advertising content continues to grow in size, stable delivery has become an increasing challenge. In-house delivery requires large-scale investments in distribution equipment capable of handling peak access levels. However, use of Limelight Networks’ CDN, which is geared towards handling rich media, enables the delivery of maximum impact online advertising experiences.

Limelight Networks’ CDN support to MDAS starts with a campaign site, “PRIUS Channel” for Toyota Motor’s hybrid car, “PRIUS” (URL: http://prius.jp.msn.com). Visitors to the site can enjoy a virtual drive, movie, and commentary function.

“Even in the event of unforeseeable spikes in network traffic inherent in advertising campaigns with rich media content, Limelight Networks’ CDN prevents media access failures and delays in display caused by increased load on servers, providing users with a consistent and high quality viewing experience,” said Shinji Tsukamoto, president of Limelight Networks Japan.

Safe-Harbor Statement

This press release contains forward-looking statements concerning the company's operations and use of acquired technology and intellectual property. Forward-looking statements are not guarantees and are subject to a number of risks and uncertainties that could cause actual results to differ materially including, risks associated with the integration of acquired business operations and other risks described in the company’s quarter report on Form 10Q and other periodic reports filed with the Securities and Exchange Commission. The Company assumes no duty or obligation to update or revise any forward-looking statements for any reason

About Limelight Networks, Inc.

Limelight Networks, Inc. (NASDAQ: LLNW) provides on-demand software, platform and infrastructure services that help global businesses reach and engage audiences on any mobile or Internet-connected device, enabling them to enhance their brand presence, build stronger customer relationships, optimize their advertising, and monetize their digital assets. For more information, please visit http://www.limelightnetworks.com or follow us on Twitter at http://www.twitter.com/llnw/.

Media Contact:

Paul Alfieri of Limelight Networks, Inc.
+1-917-297-4241
palfieri@llnw.com