Beyond The Big Three BSDs, BSD Alternatives
The DragonFly BSD LiveCD got a mention in this article over at Server Watch.
DragonFly BSD is provided as a Live CD and will boot into a fully functional DragonFly BSD system. Unlike pure Live CD products, however, it can also install DragonFly BSD.
And page 2 has even more information on BSD LiveCDs, including introductions to Frenzy, FreeSBIE, and GuLIC-BSD.
The Frenzy Live CD is similar to Knoppix and LiveCD.