Free Lunar Lander T-Shirt
Courtesy of the Lunar Lander Challenge blog. All you have to do is provide the t-shirt; they're giving away the nifty design:

So in what sense, you might ask, is this a free t-shirt? Well, I hate to break it to you folks, but TANSTAAFTS. (Hat-tip: Robert A. Heinlein.)
Meanwhile, in more serious Lunar Lander Challenge news, it looks like Armadillo's entry has been given the green light to make a run for the prize. (Check out the neat photo of the Quad Lander in action.) How many years away, I wonder, are we from a challenge prize that involves actually landing a spacecraft on the moon?