How about SM providing a rentable renderfarm? Nice side earner for 'em.

I would really like to see swapable body parts. Don't like the head? Just change it.

It would mean that instead of a provider having to create a whole new mesh, they could just supply the bit that they specialise in. Sort of like hair, only more integrated.

New boobs? No problem.

It could work for animal or fantasy creatures as well. Chimera? Minotaur? Just pick 'n mix.