Limelight Networks Inc., a company that hosts and distributes Web content, today announced it plans to purchase Eyewonder Inc., a leading online advertising company that specializes in rich media and video.

Limelight provides infrastructure that enables the delivery all sorts of Web content, including video, live streaming video and game and software downloads.

Media companies such as CBS, MTV, MSNBC and Fox Interactive Media are among Limelight’s clients. It recently added TheKnot.com, a popular wedding-planning site, as a client.

“Today’s announcement represents the next step in the growth and success of online advertising and in realizing the vision EyeWonder was founded with ten years ago. Limelight Networks and EyeWonder have worked together as partners for years, and have shared a passion for helping publishers of all types better monetize their content. By combining and integrating each company’s distinctive areas of expertise, we will create unique and independent service offerings that will deliver exceptional value to our clients and partners,” said John Vincent, founder and chief executive officer, EyeWonder, Inc.

The press release is here.