NOAA has catalogued an amazing set of interactive satellite photos of the entire region affected by Katrina.
Old Fashioned Linking:
http://ngs.woc.noaa.gov/katrina/090E29M_KATRINA.HTM
Entire Gulf Region
It is really quite simple. Follow the link, then keep clicking on smaller and smaller squares until you find the region you are seeking and then zoom in or out on the photos. I know you are not dumb, but I am frazzled from lack of sleep, and it baffled me at first.
We are still searching my for my fiancé's mother's home, but have not found that square.
I will delete this diary if it has been posted already!
Good luck all!
crossposted at My Left Wing
UPDATE: I am working on the NOLA Link.
I will get it back up soon!