The Internet Archive hosts a television archive of the events of September 11 called Understanding 9/11: A Television News Archive.
A resource for scholars, journalists, and the public, the Archive includes over 3000 hours of international news coverage from 20 channels over a seven day period, 9/11 through 9/17, 2001. The intentional coverage includes broadcasts from Mexico City, London, Beijing, Baghdad, Paris, Ottawa, Tokyo, and Moscow.
You can also watch the presentations of 10 speakers at the recent Learning From Recorded Memory: 9/11 TV News Archive Conference that was held in August 24, 2011.
While the Vanderbilt News Archive has coverage of the major US networks during this time, the non-proprietary nature of this collection is invaluable to folks outside University communities. The inclusion of international coverage, though limited, is also a plus.
I guess I should have posted this last month closer to the anniversary, but archives are about timelessness as much as timeliness!