Dean Karnazes made headlines by running a marathon in all 50 states in 50 days. The idea inspired a lot of people. Unfortunately, running in all 50 states is a bit of a challenge from a logistical standpoint, especially if done in 50 days.
Enter half2run.com (http://www.half2run.com). It's a running club set up to track the progress of people running a half marathon in half of the states... something entirely possible for most runners. It would add a bit of motivation to not only run, but to also travel to other areas of the country.
The club is being organized by Tracey Cohen of RunningFit (http://runningfit.com/), a local running store here in Michigan. They're best known for the awesome races they direct, including the famous Dances With Dirt Series (http://www.danceswithdirt.com) and the Woodstock Running Festival http://www.runwoodstock.com, the site of my first 100 mile finish.)
Right now, they're having a contest to design a shirt for the club. The prize... a lifetime membership in the club, a free tech shirt, and other great 'swag." If you love running and travel, check them out!