ROI is pretty much non-existent for the erupters. The BFL isn't much better. You'll lose out either way, assuming the BFL wno't get to your doorstep for two months, what with the exploding difficulty and all.
I am surprised there is only one pool. I know that scrypt pools rule, but I would have thought a couple more would have sprung up. I guess because ZET is only on a beta exchange (which isn't working atm) that people wont take it seriously until it hits Cryptsy.
I think the Captcha is part of NSA's profiling plan. One try - born after 1990. Two to five tries - born before 1990. More than five tries - born before 1960.
I can get past it the first time and I was born before 1990.