The new rage for some of the shopping-centric affiliates and publishers is crowd source comparisons. Looks like BeatMyPrice.com is doing well with the model.
There is a nifty ajax interface, lots of options and the inevitable selling feature of the “deal feel.”
People Powered Price Comparison » BeatMyPrice.com
1. Find the best price you can online
2. Visit beatmyprice.com
3. Enter the details
4. See if someone has found it cheaper elsewhere
5. Save! (otherwise your price becomes the one to beat)
I expect to see more and more of these as the deal space heats up with the faltering economy.
AppScout also has some info on the site.