I don't wear a lot of t-shirts, but I've always been fond of making them, first with paint, now with the aid of a computer. For the Omaha Spine show I made t-shirts for myself and my wife.
They were done by printing a design on a special t-shirt iron-on transfer. If anyone would like a copy, let me know. Just for a few bucks I can send you a transfer and you can iron it on yourself. I'll send you the Illustrator files for free.