This is huge. Now, some ebay listings do show up in Google's new Product Search, but three other marketplaces do seem to have a favored status. It's worth doing a little defensive research, so you don't get buried in the sauce. Fortunately I don't have to worry, I don't sell on ebay anymore. But I asked a question in another thread as to where to sell other than ebay, looks like my choice is between E-Crater or E-Bid. I don't make stuff, I'm a re-seller, so Etsy wouldn't be a good fit for me.
http://www.auctionbytes.com/cab/abn/y09/m11/i10/s01Google's product search engine will be the new way to shop on line, superseding Ebay.