November 10th 2007. Xbox Live Status. Detection started at 11/10/2007 4:06PM EST.

Errors:
Online Gaming:
- Multiplayer Lag
- Multiplayer Hosting Problems
- Unable to join hosted games.
- Rainbow Six Vegas' "Invite to" dead.
- Unable to download Auto-Update.
- Leaderboards down.
- Random Lag messages on Gears of War.

Xbox360 Dashboard:
- Marketplace Down
- Advertisements down.
- Unable to download anything.
- Unable to update gamerpics/mottos/zones.
- Recent Players' gamertags showas "??????".
- Unable to send messages.
- Unable to read messages.
- Unable to send chat invites.
- Unable to log into Xbox Live(Between 4:11 & 4:14PM)

Player Profiles/www.xbox.com/Gamertags:
- Xbox.com down since 4:06PM 'til current.
- Gamertags show up as "?".
- Gamertag Gamerscore is "0".
- Gamertag Zone is "None".
- No country.
- No motto.
- Currently Playing "online", no achievements and is "online".
- Compare Games is down.

You'd say after Halo 3 pulled a massacre on Xbox Live, Microsoft would upgrade their servers. I dunno, but I think Call of Duty 4 caused this downtime. If not: Microsoft is ranked #1 on "Screw up once, do not learn. Screw up twice, do get sued."