Torrent Droid is a great little app that allows users to easily find torrents for just about any movie, game, cd, etc. Just scan a UPC bar code and the app will search BitTorrent automatically. At least one of the major sites (Pirate Bay, Minonova, Demonoid, etc) should return results, and you can then pick a torrent to send to your PC at home to start downloading.

Check out this video from Androidandme.com