> The ironic thing is that attorneys make mistakes too - happened to me and a handful of people I know.

I commented on this above, but it nearly happened to me, too. We picked an immigration attorney to look over our paperwork, just to make sure we didn't make any glaring mistakes. While we did get some good suggestions, they missed something pretty big that we found on both the official government documentation and a number of forums, and had decided not to go with their services anymore. Luckily we caught it prior to submission.