Debian developers learned this morning that someone had hacked into one of the project servers (gluck), so the debian team took all of the servers offline to investigate, flatten and rebuild.  Here's the message:

http://lists.debian.org/debian-devel-announce/2006/07/msg00003.html

Please note that you should not confuse this hack of the Open Source debian project with the one from November, 2004, Hackers Attack Debian Linux.  That was a completely different incident.