Dang your smudging is BEAST. Could you post a tutorial on how to make that signature with gimp/photoshop? I mean the "Photography is art" one. I belive it would be a great contribution to the tutorials section.
Idk how i would do a tutorial on that. Its default smudging with a idk 14px hard brush. Then add Shades and Tints to it. I have a smudge tutorial on something else though.