To watch online, try: http://www.watch-movies-links.net/ - take the time to read the various ratings for the links as not all of them work, but otherwise it's an ok site (wonder how long it will be up for though hehe, "free movies" somehow sound too good to be true ^_^)
Oh sorry I missed the second part of your question! BitTorrent tracker sites are a popular choice for downloading movies, try http://www.mininova.org/ for example.