This could be the basic design, the colouring I did for fun. The user number is in the back as first two digits are big and the rest are written under it with smaller letters.
I'd totally get one. I think it should be just one colour though... to cut costs... What do you say folks, i'm thinking either Kelly Green or Gdaddy Purp. With black trim no matter what (anything white is just going to get mad rail stained.)
thinking about it.. to make this possible at all it needs to be simple.. like a black jersey with the logo on front and a number on the back.. with newschoolers in place of a name... custom username/number gets too complex, and un realistic
the thing with people getting their own username and number on the back would probably cause a problem cuz it would just cost too much to do that by itself unless it were screen printed which would not make it too good of quality.