I'm not sure if you guys are aware, but SDA is basically 'the' speedrunning site for video games. They have everything from sonic to starcraft played as fast as possible.
For the next 4 days they are running huge amounts of games from old NES games to modern PC games. The whole list is here:
http://speeddemosarchive.com/marathon/schedule/
The stream is here:
http://speeddemosarchive.com/
They're doing this run for the Prevent Cancer Foundation, and they want you're help to raise money. It's also pretty cool since some "well known" runners are going to do the games they're especially good at.
Enjoy and help a good cause!