When my friends and I used to play Gamma World (Is this an inapropriate time in the world to bring up nukular mutations?) (OK. My heart goes out to the people of Japan. Japan holds a special place in my heart, and any reference to mutants or radiation is not intended to suggest a disregard on my part for the terrible situation in Japan.)Let's try this again.
When my friends and I used to play Gamma World one of the best parts was making characters. It was a random generation system at the time, so you always had to be willing to get junk. (I think that was one of the main reasons that gaming wasn't as popular as it would have been. Getting to BUILD your character has always been better for the game.) But one of the coolest abilities was Multiple Limbs. Now, from what I know of MMORPGs, they don't like to have too many body styles. Yet, on Second Life, people have developed work arounds to be animals, dragons and such. So, there isn't a lot that would stop a MMO from developing a system of Multiple Limbs. We just have to convince someone to take of the banner of Gamma World again, and Dev it into the MMO universe.