No thanks, CDNs are too fast for me. Comcast Comcast is now competing against content delivery networks (CDNs) such as Akamai with a new service that can improve delivery of video to Comcast subscribers in exchange for payment. "This new offering allows content owners to go directly to the ISP and have their content stored and delivered via the last mile, thereby displacing some traffic currently delivered by third-party CDNs like Akamai and Limelight Networks," well-connected industry analyst Dan Rayburn reported today.