As a very infrequent bidder, I have no problem going to BiddingForTravel and BetterBidding when I need a Priceline room somewhere. To me, those sites are most effective when a lot of people post to them. Having a 3rd site would simply mean having to check a 3rd site. I vote on leaving things as-is.

On a side note, the cultural differences between FT (would never dream of sitting in the back, over-water bungalows, etc.) and BiddingForTravel (where can I park for free and take public transit back to the gotel to save $10) can be amusing to see. Of couse, depending on what I am doing and who is paying the bill, I can find myself in both camps at different times