Actually, i think that the lack of H.264 (Canon DSLR) presets is completely unrelated to licencing reasons. If that were the case, I guess there wouldn’t be H.264 in Adobe Media Encoder CS5 trial as well. But there is.
Premiere CS5 tryout is kind of useless. The only real feature, Mercury engine (which is really impressive and fast even on older HW), cannot be put to good use. And even with Mercury working, it’s still the same old Premiere – clunky interface, reconnecting media hell, unstable capture, bugs all over the place. Thanks, but no thanks.