The Extra Life Charity marathon is going on this weekend, and though players don't have to stream (or play the whole 24 hours, really -- it's all in good fun), lots of people will be doing so. Our very own Arthur Gies is even participating in the event all weekend long, as is Massively writer Beau Hindman. The Paragon Studios team will have a livestream up, Rift has a special in-game event going, and outlets like G4, GotGame, Aussie Gamer, and Platform Nation are all joining in to play and raise money.
If you'd like to contribute, it's definitely not too late. Play some games, watch some people playing others, and by all means, head on over to the Extra Life site and donate a few bucks to the cause. It's great to see gamers come together in a huge event like this, to both celebrate the act of playing games, and of course raise some money for charity as well.