Anybody ever tried Chartbeat?
 

http://chartbeat.com

If yes, usefull? It looks pretty neat but not sure if it gives any more info then for example G.A.

Neat is probably the exact word I'd use to describe it. I don't think it's very useful, though.
My host was offering a free two week trial a couple months ago, so I signed up, played around with it a few times and, like an idiot, have paid for 2 or 3 months because I keep forgetting to cancel it. lol
One way it might be useful for you guys, though, would be to use it pull visuals for a media kit.