eBay has just launched a new site called eBay Neighborhoods that contains over 600 small social networks, each centered around a unique product. Each network includes content pulled from eBay including blogs, reviews, etc. and also allows users to add new content such as forums, photos, etc.

Only time will tell how these networks will stack up against other social shopping networks. But with its current user base, if done correctly, eBay could soon be the top player in the field.