Was pondering this today. Obviously you wouldn't be able to accelerate a 1-ton satellite to escape velocity, but what about small objects? 11km/s (well, even more, to overcome friction on the way) is very daunting, but if it could be managed you could easily send large amounts into space. And without the "a single mistake wrecks millions of dollars" to boot. EDIT: A quick v^2 = 2as says that if you could accelerate at 10g for 55m, you would reach escape velocity. That doesn't sound too bad.