This will be my last post an Katrina, the remnants of which are developing extratropically in NE Canada and about to get trapped somewhat to the west of Greenland (good riddance).

For those looking for information on a particular section of New Orleans, the experimental NOAA research program designed to gather high-resolution data of areas where storms make landfall has made available high-resolution imagery of much of New Orleans (to match that made available for Mississippi a day or two ago).

You can get to it at:
http://ngs.woc.noaa.gov/katrina/090E30A_KATRINA.HTM

Note that in many cases, the images are not rotated to match their actual orientation (e.g. the top part of the image is not always north). What I found helpful was to use Google Maps (http://maps.google.com/) in hybrid road/satellite mode to correlate ground features and get my bearings. For instance, in the Kenner/Metairie area, many of the images by I-10 are oriented such that the top of the image is to the east.

The full collection of images can be found at http://ngs.woc.noaa.gov/katrina/KATRINA0000.HTM. I hope this helps some of those in the storm's path.