Last night there were some issues with live with the people I was playing with. People in Europe and Canada were having no trouble, however another guy and myself are on the west and east coasts, respectively. We both have been experiencing problems and Xbox Live is down.
There are several threads on the official XBL forums about it
a quote from the official XBL forums
Don't worry, you haven't been banned just because you are getting a Z:XXXX-XXXX code.
It appears that it is down everywhere, however it may be possible to log in to live through a game, but not the dashboard. I have been able to log into Live through COD4, and join a match.
Edited by Mad_Gouki, 27 December 2007 - 01:23 AM.