Except that the Linux client to KaZaA has stopped working a while ago. And the Windows client is apparently full of evil spyware (and, on top of that, requires you to run Windows).
It's pretty easy to get around the spy-wear in Morpheus if you actually read the message boxes in the installer program. My main problem with morpheus is the dodgy quality of the ads in the program. When are internet adversiters going to start promoting something that people actually WANT instead of spy cams and casinos? It might be a bit more tolerable. Audiogalaxy is great though, and the Linux client works well once you've got past the dodgy install instructions.
ad-aware takes care of the spyware
i'm entirely not surprised.
btw, morpheus seems to have filled napster's shoes reasonably well.