If you can't wait for your desktop 3D printer...

Fabjectory is a service bureau that will take your Second Life Avatar or your Mii (from your Nintendo Wii) and make it for you with a 3D printer. Since the first generation of desktop 3D printers is just now coming out, and the first ones probably will have relatively poor resolution and no color, there's certainly a window of opportunity for Fabjectory. (And even today, you have the choice of printing you own photos or having a service print them for you - and most people get better results from a service.)