I've had a CafePress store (http://www.cafepress.com/crimsonquill) for a couple of years (all profits are donated to the American Cancer Society, btw.) and I've never had anybody say anything to me about font use. I've used a bunch of freeware fonts.

I'm with whoever said that donating to charity is covered under non-commercial use. CafePress has really strict TOS, so I would think they'd crack down on that severely, if it wasn't permitted.

(Also, I draw, so I could help you with the "Heroine Addict" t-shirt, if you decide to go with that.)