We as subcribers to Comcast cable TV services want to be able to view the channels we are paying for access to on our Roku devices.  The Roku on demand features for the channels we love on Comcast offer us more of the content we are paying to watch.  Since Comcast does not provide us with an equal amount of access on their on demand system they should allow those of us with Roku to fully enjoy and experience the channel we pay our hard earned money for.