Our friends at Sarcastic Gamer are putting together a very special gaming marathon to benefit the Texas Children's Cancer Center. Set to begin October 18, 2008, Extra Life asks gamers to help raise money during a mass 24 hour gaming marathon. The concept is simple, sign up on the Extra Life website, find four sponsors willing to pay one dollar per every hour played, and start playing on October 18. All of the money earned during the marathon will go to the Texas Children's Cancer Center at Texas Children's Hospital. To find out how you can become part of Extra Life, head over to the official website.