I cringe at the thought...of an official live cd meant for beta testing of specific applications. Dear god, fedora would have to re-roll a new livecd image EVERY DAY during the beta testing phase...so you could download a new livecd image EVERY DAY to incoporate the new package updates that come out EVERY DAY. Dear god! that would complicate the
Kernel tests run out of a live-cd might be good to test machines that don't even have the beta installed.
greetings,
Florian La Roche