Use Soulseek for music and Emule Plus for video. Shareaza Gnutella stinks these days- doesnt work on windows 2000 or windows XP (fresh installs). Used to KICK ***. Spec:
*P4 2.6ghz
*windows XP
*broadband 1Mb download, upload 15 kB/s

(Limewire is worst of all because at least shareaza has edonkey and isnt infested with adware)
(Shareaza seems to be untalked about)