I personally use MyEpisodes.com for shows that I watch on a regular basis. This covers most of the primetime shows and such. Register an account there (free) and go to http://www.myepisodes.com/rsshelp.php
...it will tell you how to configure your RSS reader for all shows or today's shows, etc. This is for an RSS reader, that is. It's not a mobile TV Listings website or anything.