Any chance of making slinging.org hooded sweatshirts? They'd be perfect for the upcoming winter months, and why not give them as gifts to that aunt or grandmother who always knitted you that three-armed sweater
every christmas? (Love you too, Nan!) And besides, they would have that cool pocket in front that would be perfect for hiding rocks and/or slings
Personally, just for simplicity and cost's sake, I'm all for keeping the design simple, down to something like the silhouetted man whirling the sling above his head and slinging.org below him and across the yolk of the back. But, whatever the design, yeah, count me in for a shirt!