Basic configurator for the new F30 is already up on BMW website. But for the moment it is just basic vehicle configuration to view the multiple choice of the new 3 Series Lines (Sport, Luxury, Modern and M-Sport) as well as Standard model, with their respective color and rim choice. The Vehicle Configuration can be found at: http://www.bmw.com/com/en/newvehicles/3series/sedan/2011/showroom/design/visualizer.html
Below is my dream combo. A Black M-Sport with 403M alloys which, like current E90 M-Sport, looks really menacing. What's your pick? Check out the above link to build your own.