Akamai, Limelight facing tough headwinds By: MarketWatch June 28, 2011 at 00:01 AM EDT Content delivery network providers face some tough competition ahead as AT&T enters into the fray with its own rival system Read More >> Related Stocks: AT&T Inc Akamai Technologies Amazon.com Citrix Systems Comcast Corp Google, Inc. Juniper Networks Limelight Networks Netflix Verizon Communications