Great idea! Thanks for taking the initiative on this!
Here's a suggestion, you can take it or leave it at your pleasure.
Maybe you should consider setting up a group buy though the classifieds when you get the artwork done. I bet some people outside the RMIC forum might also be interested, and more orders means lower per-unit set-up costs.
Also, if you're looking for size info, some of us would appreciate XLT or XXLT sizes. The 6'5" people among us (me) hate it when our shirts come untucked all the time.
Does your supplier also offer long-sleeve T's?