Anyone playing Ingress?

I know it's a little different than what most people around here play, but has anyone gotten into Ingress yet? (http://www.ingress.com)

It's in closed beta atm so you have to request an invite (and they aren't handing them out rapidly, mine took well over a week), but it's pretty fun and gives me something to do during boring lunch breaks now.

I won't try explaining what it is other than to say it is a Augmented Reality game, funded in some part by Google, involving GPS and landmarks and the like.