Why not research up whether Spreadshirt or CafePress offer tech shirts and possibly sublimation, and then post out the selections and details? If BPL could present a design on a material/product we're likely to buy, then we can buy the shirts and support the site that way without BPL going out of pocket on a not-sure thing.
The safety net here is that when internet warriors kibbitz back and forth over the particular shirt, the use of sublimation vs. a gram-heavy silk-screen or heat transfer, it won't matter: the person ordering the shirt can pick color, size and whether our logo is to be flocked, screened or better.
Profits on tees are minimal and, in my experience doing them, are more for stokin' out the members of the online community.
Otherwise, die cut stickers are pretty darn cool.