Microsoft wants you to help set a Guinness world record for the biggest ever virtual sprint

Microsoft's Kinect has already claimed one Guinness world record, and the company's now asking for your help in setting another -- don't worry, though, you don't have to buy anything else. It's asking folks to take a bit of time during the free Xbox Live Gold preview weekend later this month to set a record for the "most people running a virtual 100m dash at one time." To take part, all you have to do is download a free Xbox Nations gamer pic that will automatically register you for the record attempt, and then load up the sprint mini-game in Kinect Sports and start running at the time specified below. Everyone that takes part will get the snazzy Guinness World Records avatar tee pictured above for their trouble -- actual Guinness certificates still have to be earned the hard way.