Edgeio?

What is Edgeio?

"The way Edgeio works is that bloggers would post items they want to sell right on their blogs, tagging them with the word "listing" (and eventually other descriptive tags). Then, Edgeio will pluck them as it constantly crawls millions of blogs looking for the "listing" tag and index them on Edgeio.com."

I think this is the model of the future. A mix of decentralized and centralized, working with standards. As opposed to (paid-listing) sites like eBay, Craigslist, Monsterboard, Match.com and Google Base where everything is centralized. Structured blogging and microformats are other examples of this trend, there's more to come...