Anybody try this? http://exchange.contextweb.com/

looks like an intersting concept and seem a few similar ones like AuctionAds, but my feeling has always been that none of these mediums draw in enough advertisers to be worth it for publishers- ie. the ratio of advertisers to publishers is too low and competition for a publisher's space doesn't happen often

anyone have any success here?

The site seems lucrative, but have to wait for some reviews to get started with it...
I doubt if my site would even benefit a penny out of that.
Will be looking forwards for the posts...

I don't see what is different to the others in the marketplace...

Schemes driven by greed only work when the greed is covered up

Schemes that use greed as a selling point are doomed to fail - in this instance naive publishers will ask for $10/click believing that's what they'll get.

At the same time advertisers will be sold on the idea that there are people willing to take just $0.01/click and will only select those....

The software that drives the system will therefore not be able to find any matches...publishers make no money/advertisers loose no money and gain no sales