Okay, I don’t have kids yet (well, the one I have is doing all the playing he wants in the womb!) but I came across the KaBOOM Playspace Finder the other day and thought it was a great idea.
It’s basically a Google Maps mashup that lets visitors review “playspaces” (by which I’m assuming they mean parks and playgrounds and such), and browse using a map. They say “there are currently 10468 playspaces in the KaBOOM Playspace Finder,” and there are a few shown within a couple miles of my house, so it seems like it’s got enough info already to be useful.
Besides, kids aren’t the only ones who like playgrounds! 
