From their website:
Mario Marathon is an annual fan run fundraiser for Child's Play Charity. Child's Play provides toys, games and books to patients of children's hospitals worldwide.
The multi day internet event, broadcast live online, attracts an audience from around the world to watch as the team plays through twenty five years of Super Mario Brothers video games.
Now in its third year, the event has attracted over 300,000 viewers, and raised nearly $45,000 for Child's Play.
This is a fantastic, fun way to raise money for charity. Plus, they're based in Lafayette, IN! I actually met one of the players when they came out to our Boobquake rally to show their support. Check out their site to donate, and make sure to tune in on the 25th!