I was thinking the same thing a few months back. I think it is a great idea. I don't think a new website is necessary, it could just use a new forum, or even make use of the partners forum. I think a standard mileage/payment is a good idea to stream line things. Basically people could just post a thread about where they're climbing and how many seats they have, when they are leaving/returning. Given current gas prices it makes a lot of sense.