I'm in the same boat and also in the bay area. I sometimes drive down south, so I might be able to save people on shipping. No big deal.
Just an FYI, I just emailed Tepui with questions about a group buy as well. I'm curious what the price break down is. It seems like the OP's original deal is really good though.
Nice. Even if they can reasonably match the rei 20% + shipping i would be interested