Well on wv sat images it looks like Katrina is reorganizing quite rapidly.

Looking at conditions on buoy 42003 as the hurricane moves past, south of it. This buoy is located NW of the storm, at 1.5N and 0.5W relative to the storm's current position (could someone work out how many miles away that is). Wave heights have averaged over 20 ft since early this morning and are currently approaching the 25 ft mark as windspeed has been increasing (up to around 40kts steady now). The waves will probably be even higher shortly, as the storm is directly S and the wind shifts to due E.

It looks like the only other buoy before landfall will be 42001, tomorrow, because 42041 is not in service anymore.

Edit - Oh WLOX has an excellent online hurricane center for resources for MS, and also tracking map that shows buoy locs and the shortcuts to the NOAA page for each.

http://www.wlox.com/