Along the lines of kazaa.... Don't get kazaa. Kazaa sucks... its gives you craploads of spyware (popups, etc). Go for:
http://doa2.host.sk/ - Kazaa Lite
Also, to get rid of all that crappy spyware:
http://security.kolla.de/ - SpyBot: Search and Destroy
Also, admuncher is good for getting rid of ads withing a website:
http://www.admuncher.com/ - ad muncher