Reader Richie has done something genius -- he is a big fan of the Scarlet Crusade, having collected all of their armor and their tabard ingame. And when one of his guildies hit a birthday, he decided to take the design from the tabard, and put it on a T-shirt. You can see how well it turned out above, and there are pictures of the box (probably my favorite part of the whole thing -- he actually printed the "tooltip" for the t-shirt on the front, in the official WoW font, called Friz Quadrata) over on his site. The whole thing looks terrific.
More pics of the shirt, including the front of the box and a pic of the shirt in action, in the gallery below (hopefully we won't murder Richie's site, though it was loading slowly when I first pulled it up). This is a brilliant idea -- what other Tabards should be t-shirts? Forget Figureprints, Blizzard should let you print your own guild's tabard out as a T-shirt for sale on their site.
Gallery: Scarlet Crusade Tabard T-shirt