windown xp:
http://www.battikh.com/other/winxp.zip
knoppix:
http://www.battikh.com/other/knoppix.zip
ubuntu:
http://www.battikh.com/other/ubuntu.zip
suse:
http://www.battikh.com/other/suse.zip
mmm, for suse and knoppix is pretty much the same sounds, it's the kde sounds... but for knoppix you have their own starup and logoff sounds, other files seem to be the same :p