I have been very happy with our setup now that we have cancelled our Comcast cable TV service. For the shows that are not available on terrestrial television, the selection of content available on Hulu has been great. Unfortunately, Comedy Central decided to pull their content from Hulu.
Today, I got an email from the PlayOn team, mentioning they they have added support for playing Comedy Central content, in addition to content from NCAA March Madness, MLB and Pandora. I installed the update, and it works great.