The Oregon NASA Space Grant Consortium announces that it's time for competitors to register for the 2008 NASA Great Moonbuggy Race. This race is in its 15th year. It features human powered "Moonbuggies." (I don't know if that's how you spell the plural, but I like it that way). There are high school and college level competitions. I have more links on last year's Moonbuggy Race here.
Would it make sense to hold some kind of "lunar" human-powered or robotic race like this in conjunction with another space event like next year's X PRIZE Cup?