Pat Kitano has reviewed the hyper-local sites in a this post. What is interesting is the way he differentiates the sites. It seems obvious to me that the categories are differentiated by features, in this regard. How granular can the communities get?

• Sub neighborhoods
• Neighborhoods
• Zipcode based
• Neighborhhod + demographics?
• City + demographics + real estate - food + housing services + school based communities - your crazy neighbors - NRA idiots?

I would like to see sites like this succeed and further connections AND commercial activity.