Check out my sig, used GIMP's fractal flame rendering function and got this:
What do you thínk about it?
I like it. It´s not as crowded as many forum users have. I would do something about the font though. It looks quite plain.
I like the fractals part
Not too busy or "insane-like". I agree about the font, though. Maybe bold it a lot and give it an outline or something? A shadow? I don't know...but the text needs something...
I too agree on the font, but since I don't have photoshop on linux I can't really do anything in gimp (I don't know how).
I like it looks good keeped it simple nothen to flashy
neat. drop shadow is a nice effect for text.
I actually like the Text with the background...
Looks good
Try to duplicate the text layer and aplly a Gaussian Blur filter on the duplicated text layer to make a smooth transition to the background. But it looks nice already.
I like it, but you might try adding a border, just a thought though.
its very plain and boring, needs alot of work
I like it alot man, nice job. I definetly gotta second the gausian blur idea, but not the border. And notice the signature of the guy who said it was to boring.
ya its a little boring.. but gimp isnt the best program for sigs.
I like that graffics...
Keep up the GOOD works.. 
The font is great. It accentuates the minimalistic style of the sig.
wow that's really nice looking. great work!
the fractal part is absoluty beautiful but you can make a colored version of it ^^
its lines is so cool...
nice 