I tried using Kazaa a few years ago when it first came out and didnt really like it - but I admit I havent tried the current incarnations that are probably much much better.

I personally have fallen in love with Soulseek.

no suprise here....just imagine if they counted everyone downloading the lite versions. The beast has grown and it's gonna be hard to stop it. And i'll easily get my fair share of it's use :).