to stream TV with ORB, you have to have a tuner card in your PC, and use your pc's internet connection to 'stream' it... so if you dont have a tuner card... its pointless, cuz those things run 100-150 for a decent one. If you have satellite.. (like me) your really screwed...lol
For anything else... like movies, muzic, pix etc that you have on your pc... Orb is great if you have a fast internet connection!
In that case, try out ORB... with a fast cable connection you can stream anything from your pc... again though u need a tuner card in your pc. other wise you can stream rss feeds aswell. there are plenty of rss feeds that play full episodes of tv programs. Just gotta find em!