Well I've tried making one myself and that just doesn't work. I've tried Photoshop, Jasc Paint Shop Pro, and even Paint. Ironically the Paint one came out the best.
Actually I should have known it wouldn't come out well.
(<---C's in class Art.)
What I'm asking really is if I supplied an image, if anyone would be willing to make a siggy for me. You can take as long as you want and it's okay if no-one does, I'll just Google me a new one. My signature just looks a little bare.