It's alright, I'm not too fond of the bg, the grid on the left part has more opacity then the one on the right, it needs a border or something, the render popping out is really choppy, and the pixel font needs work. Good attempt though.
Your using IE, right? If your using FireFox you wouldn't see all of that white because the bg is transparent...
The sig is ok. The render has some white around it and kinda looks bad. You should try to do something with the text also.
I like everything but the render is not good needs to be done better to much white around the edges... Over if that would be done I think it would be pimp..