I've heard the Kaza installer had a worm itself but it wasn't dangerous at all, personally i use Audiogalaxy cuz it's not only peer to peer, it downloads from various sources and u can make a list so i go, select about 100 - 150 songs and let the PC online 24/7 while i'm out Morpheus is kinda shitty right now,Napster underground servers sux, i've been told that WinMX works real good, but Audiogalaxy rox...

PS: to download videoclips i'd suggest to use kazaa