Hmmm, nice look man.
Id say you need to fiddle with the text to find a slightly better more suitable one.. and not sure but just the middle of it looks slightly bland and empty.. maybe dup the layer n play with blending options to get some bright patches so its not all so much the same over that part of the sig.
But it looks pretty good, nice work man :)
No, use pngs, not jpgs. Preferably interlaced mode. Pngs save all the colours and quality alot better than jpgs. But if you must use a nooby format like jpg, set the quality to 12.