Well, it's clear people are trying to populate this domain. But there seems to be different angles at getting into the market.
Some people just like to window shop, be it online or in real life. I think sites like http://www.thisnext.com, http://www.kaboodle.com tailor to those people pretty well, since they let users aggregrate content to their website for browsing. It's almost like a virtual mall.
But what about people who want to do research or talk in a community? That's where I think http://neighborhoods.ebay.com/ and http://www.buypile.com get a little more interesting. They almost provide a forum on various topics that people are interested in.. it's almost like how you'd get advice in real life about things you want to buy.
Only time will tell which type of online shopping site becomes the most popular, although I feel like we'll have room on the internet for all these sites.
