BCrypt + GTX670 = 6 c/s?

[unix-ninja]

Never expected it to be THAT bad, cracking-wise.

That's kind of the whole purpose of bcrypt. It's an adaptive algorithm, crafted so that even when hardware advances, the time it takes to attack the algorithm can stay consistent by simply increasing the iteration count.

Your best bet for bcrypt (as we used in defcon) is clustered computing.