Only the BEST way to get large files quickly!
It's P2P, but you can't search or anything. You find a .torrent file, and open it with your client which connects to a server that just lists people that are currently downloding the file. It's called a tracker. The nice thing is that there's no option to turn sharing off and the upload/download is on a ratio.. it seems to be about 10/1 or so. I've been grabbing some other 'movies' recently with it and a lot of the time get 600-900k per sec on popular ones.
You can use shareaza or one of the actual torrent clients found at
http://bitconjurer.org/BitTorrent/