Clan night tonight. 9pm PT. Halo 4.

War Games focused.  OD will be hosting games.

Also, the new Crimson Map Pack is now available.  Reposted from 343:
 

The Halo 4 Crimson Map Pack is officially available in the wild! And by the wild, I mean the main menu of Halo 4. You can download the Crimson Map Pack for 800 Microsoft Points from the Xbox LIVE Marketplace, and it's also available at no additional charge for those that purchased the Halo 4 Map Pass or Halo 4 Limited Edition. If the latter applies to you, follow the below steps to download the new maps:

1. Load Halo 4
2. Press Start
3. Select "Xbox LIVE Marketplace"
4. Download "Crimson Map Pack"

If you'd like more information about the Crimson Map Pack, check out the following articles. Otherwise, we look forward to seeing you on the new virtual battlefields!

Halo 4 Crimson Map Pack Achievements
Halo 4 Crimson Map Pack Trailer
Halo 4 Crimson Map Pack Screenshot Gallery