Day9 hosted an event called The After Hours Gaming League in which eight tech companies will compete each other for charity. The event has just finished its first season with team Microsoft crushing everyone else. Zynga is the runner up and Google claimed third place.
I was less impressed with Microsoft's performance than their team spirit. After all, the mere fact that MSFT has way more employees than the other teams already means that they should be stronger. However, I was surprised that they set up an internal league to select who will get to play, and that there were many MSFT people watching together live on the grand finals day. It just seems like they take fun seriously (to quote Day9 himself), and that's pretty cool IMO.