Speed Demos Archive (SDA) is currently streaming Awesome Games Done Quick (AGDQ) 2013. There will be 152 hours of live speedruns of some of the best games of all time. They will be collecting donations for a charity to fight cancer.
I would urge all of you to check it out, its pretty cool to watch speedruns of some of your favorite games by some of the best in the business. Here are a few gameswhich will be run:
Legend of Zelda series, Metal Gear Solid 3, Portal 2, Mass Effect, Metroid series, Castlevania series, Super Mario series, Batman: Arkham City, Fallout series, Left 4 Dead and many more
Full schedule here - http://marathon.speeddemosarchive.com/schedule