Offering users the ability to set up mini-P2P networks and open up their photos, music, movies and documents, Grouper does not let users download each others' music. Rather, it permits only streaming of music files, whilst allowing downloads of other content. Quite what happens when you remain a .mp3 file to a .zip or something remains to be seen, maybe someone really smart has thought of that, I don't know. Grouper aims and promises to make the process of P2P totally easy, but only works on Windows 2000 and Windows XP at the moment. Grouper has a nice GUI that shows all the available files, the users linked in, the transfers and a Microsoft media player. It should officially launch in about 10 days time.