A new real estate search site has emerged and you can find it at rottenneighbors.com

I did a quick search of a couple areas, and most had little to no activity yet, but where there were complaints they were often pretty amusing. You'll have the best luck in and around bigger cities.
But as more and more people find out about the site, it might become another important information site for those wanting to get the lowdown on a retirement community before they buy.