I added a bid for you. It is nice to see something that isnt a mlm scheme on flippa, not to mention is RoR.

I don't know if flippa is really set up for what you are doing either, but I did actually toy with the idea of starting a site that does more or less what you are attempting. The idea is that you put a basic website/design up, and people who place bids get to make suggestions. Each bid/suggestion combo creates a fork of the auction. Seller can choose to pursue only the highest bid of all the auctions, or each of the branch winners.