@Shaad: Its a thought only. Forum privileges doesn't have to be tied to the T-shirt or mug we buy with the BC logo on it..I am sure the money Zunaid gather from the ad that we click on the Xoom.com or Nordstrom is plenty to cover the server charges each month.
@Bangladesh_sy: These days many companies does it. VistaPrint.com is one of them, they charge 4.75 each. You upload a photo and the rest is pretty easy. I did the one at a local Seattle shop. They charged 3.95 for each T-shirt but had to be a minimum of 300 per order.