BitTorrent is one of the most efficient p2p systems and is great for distributing movies and other large files. The Induce act is trying to make illegal basic technologies such as p2p which "could induce" people to break copyright law.Lawrence Lessigno potential for a substantial noninfringing use?
With more powerful cameras and PCs, video and Flash have become important mediums for free speech. They are increasingly being used for political action. The integration of blogs and p2p technology for sharing these videos like the BitTorrent link above from Lessig are a good example. I believe this is substantial non-infringing use.
BitTorrent is very smart and allows you to download from multiple sources. Thus, the more people downloading/sharing, the faster the download becomes and the less stress it puts on any one person. Anyone who's posted a movie file to a blog knows what this is like. I'm downloading it now with 3 peers. Come on everyone, join in the BitTorrent p2p fun and help me make the download faster! (while it's still legal)