Re:Yeah, but what kinda mileage does that get? (Score 1)

Oddly enough, falling into a black hole is one of the most efficient ways to get energy out of matter (the only better one I know of being to react it with antimatter). You get something like a third the e=mc^2 energy with the black hole, compared with 1 percent-like numbers for nuclear and 1e-10 for chemical fuels.