For an independent site tracking post-Katrina reconstruction try the Brookings Institution, which has an online Katrina reading room full of useful resources.

Government information on the hurricane and its response can be found on the websites for the White House and the Federal Emergency Management Agency (FEMA).

Investigations into the hurricane response resulted in the Federal Response to Hurricane Katrina, the select committee report, A Failure of Initiative and the Interagency Performance Evaluation Task Force.

The University of Texas at Austin has an online collection of Katrina-related maps in its Perry-Castaneda Library.

Background information on hurricanes and storm surges can be found at the National Hurricane Center and the Atlantic Oceanographic and Meteorological Laboratory.

There's a blogger's take on the disaster at - Beyond Katrina: The Voice of Hurricane & Disaster Recovery.

AlertNet also has this report looking at how Katrina's dead were treated.

Comedian-writer-radio host Harry Shearer has been telling the story of Katrina and what's happened since. You can listen to his show online or read his blogs.

"Voices from the Storm" is an oral history collection which tells the real tales of 13 Katrina survivors, including a Vietnamese priest, a prisoner who escaped his cell to save his life, and a woman who floated her grandchildren in buckets through miles of filthy floodwater searching for rescuers. It's part of Voice of Witness, an oral history project published by San Francisco-based author Dave Eggers' McSweeney's books.

For stunning fictional accounts, try James Lee Burke's stories in "Jesus out to Sea" and his detective novel "The Tin Roof Blowdown".