it looks like a great start, but before I critique it, I have to let you know-that signature is over twice the kb limit allowed here. signatures on this forum have to be under 60kb yours is at 156kb.
Good use of alpha channels and gradients however. I'd work on your subtext a little, as it's just plain white while everything has some sort of border to it. It also seems just a taaaad bit cluttered, but that might just be-as I'm a minimalist.