since
http://sigauctions.com is doing so well, why not go to the next step?
make an auction sitef or only webmasters.
a feedback system will be great on site like this.
you can place an ad for services you can supply such as gallery building, tgp submissions, seo work, etc.
you can place an ad for scripts you want to sell, sites, domains, whatever!
maybe another spot called "most wanted" or something, where people go in and its a reverse auction. You state what you need, and someone bids on the job, or says they have the item.
sounds like a awesome idea, i bet someone has done it but i dont know where.
flame on.