PC-BSD did release a Live CD version of their 1.4 alpha or beta releases but I as far as I am personally aware, never commited to releasing Live CDs.
There are several OpenBSD based live CDs:
OliveBSD,
Anonym.OS LiveCD,
Quetzal, and
FuguIta but I all are based on OpenBSDs later 3.x releases.
I believe MidnightBSD has a Live CD capability but don't quote me on the matter. Maybe someone else here has tried it?
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Thou shalt check the array bounds of all strings (indeed, all arrays), for surely where thou typest ``foo'' someone someday shall type ``supercalifragilisticexpialidocious''.