The Chicago Marathon is three months away, but registration for the event is almost full. If you were planning to participate, you'd better register soon, because the 40,000-person limit on the event will probably be reached this week. If you don't make it into the marathon, you can always vote for your favorite T-shirt design for the event. It's not as prestigious as being in the marathon, of course, but then again you don't have to run 26.2 miles to cast your vote. (thanks to Jake for the tip)