I am going in for surgery on april 30th and my surgeon is going to do it roboticly. Heres a bit of information on it I think is pretty crazy. Sure beats getting by stomach sliced open. http://www.surgerybyrobots.co.nz/general/davinci_gastric_bypass.html
Good Luck!!! I had something similar done a couple years ago. Lost about 130 lbs. Let me know if you have any questions.
I've never been an advocate of these surgeries, not enough science behind them. But I do see their efficacy and 100% support you decision. If you feel comfortable, let us know how it turns out!