Cool, FreeSBIE has a FreeBSD livecd. I've been hearing for ages how stable and wonderful *BSD is (and I did consider it for the the new UFies.org server, but in the end decided that putting a system on the net that I didn't know about would be a Bad Thing :) but have never really tried it outside of VMWare a couple of times.
Anyway, if you're interested in trying out FreeBSD without worrying about all that scary installing stuff, check out FreeSBIE.