Quantum Accelerator:
Speeds up/slows down time.
Uses energy, the faster, or slower you want time to go, the more energy it uses. So 1.5x slower would use 128eu/t, but 2x would be 512eu/t.
Not sure of a crafting recipe, I'm thinking something with iridium plates, teles, and freqtrans. Probably not so great in smp though. Probably wouldn't affect mobs or players.
A very similar idea was proposed only a handful of threads below yours, and, like PassingLurker pointed out, has been met with general disapproval due to bugginess, similarity to EE, cheatiness, etc. Not to mention the lag factor you'd encounter with running your IC2 currents and whatnot at 2x speed...
As for a Quantum Mass Fabricator, the already existing massfab has the potential to generate something from literally nothing (if powered by renewable energy). What more could you possibly want? Admittedly, you seem to have thought up a pretty decent way to upgrade it, but it really doesn't need upgrading. If anything, you might want to suggest it for the Advanced Machines addon.