well when I need mac specific applicatinos, I go to carracho (www.carracho.com). its a Mac only system

its another file sharing system, but its not P2P. basically, a bunch of ppl set up servers (on their home computer + good connection) and you can download whatever they have you set up to download. if you're just a user (not a server) there's no way anyone except the owner of the particular server that you are on can tell what files you've been downloading

the bad news is that there's no search. If you need to search for FILES, like mp3s, then gnutella is it all the way. but for amc-specific apps, there's always carracho.