I was a Comcast customer who was forced to migrate to Time Warner/Roadrunner due to changes in the area. I really had great service with Comcast and was worried about the transition to RoadRunner for my internet provider. The worry was unwarranted. I have had trouble free service with Roadrunner and just noticed an upgrade in speed!
UPDATE: Moved in December, 2010 and decided to go with Windstream instead for both phone and DSL. Got a much better deal with Windstream!