Didn't I just answer this question? 
I don't know where everyone else makes theirs, but I use picnik.com. As you can tell, I prefer a more toned-down sig, but everyone's different, and I don't know what everyone else uses.
I don't know where everyone else makes theirs, but I use picnik.com. As you can tell, I prefer a more toned-down sig, but everyone's different, and I don't know what everyone else uses.