Seriously, you could edit that sig out of the corner easily with a couple of cut-and-copy steps. You'd never see it unless you knew to look. I agree this is a great wallpaper ruined by the signature.

yup, really nice. but your signing-tag on the bottom-right side ...sucks. (would have said something more polite here, but i learnd my english by guns n'roses. sorry.)

Pretty combination of gradient and difference clouds in layer mask :-)