Continuing my ever-susceptible streak of being suckered into partaking in Flash-based advertising, I've "simpsonized" myself at a Burger King site called simpsonizeme.com. As far as I can tell, their UI sucks and it won't actually save your character or export it correctly. I was able to email it to myself and snap a quick screen shot of it with PrintScreen.
Anyway, this is how it turned out. Not too shabby.