I've just started the process of getting two whole legs of simpons tattoos. I found the perfect tattooist - and he has done simpsons before. Jeff Ortega who runs Evil From the Needle in London.
He started with my foot, with an Evil Krusty Doll. This took 3 1/4 hrs.
I'll post updates as it comes along...about 6 weeks or so I'll be getting some more
The pics from the day after i had it done, so my foots all puffy, swollen and a bit bruised :S