First of all P2P... "Peer to peer"... your connecting directly to who knows where downloading who knows what. Another thing is P2P software has default shared folders so that any idiot can search anti-virus pages and findout some commonly shared P2P folders then make a program or script that copies itself to these folders... then next thing ya know someone easly brings yet another P2P worm to the world in a matter of seconds... j3r, calling P2P worms 0-days would be offensive to all the good coders out there... first of all P2P worms are exstreamly easy to make & have become about as common as the dirt we stand on. And also another thing... you'd be surprised how many so called "Im very carefull" & "I download only mp3" type of peaple would brainlessly checkout SexStory.vbs or readme.html or worse Hotmail_Hack.exe.