We have been writing about this concept for sometime now. The idea of a site (not a portal) where residents can bond together in an online community not unlike myspace or facebook. BeNeighbor is just that but from a condo perspective.
I bought the internet address myapartmentspace.com sometime ago with just that intent. I wanted to build a site that would act as a conduit for community. Given my hectic schedule I have not done anything with it. Now might be the time. I might have to dust off the idea and take some action on it. We shall see.