http://www.pcbsd.org
i am VERY impressed with this project, even though it's very new it has a lot of potential for home users - check it out
Here's another BSD variant that's a Live boot CD.
http://bsdeviant.unixpunx.org/
That being said, the retrostyle Black/Green Fluxbox theme might be a bit obnoxious for some people.
Live CDs are only useful as rescue systems
