yeah those radar loops from the Space Science Engineering Center at wisc.edu are kickass... here is a Katrina closeup view of the same type of map:
http://cimss.ssec.wisc.edu/tropic/real-time/visir/atlantic/visirjava2.html

What I like about it is that it automatically switches from visible satellite to water vapor after sunset, then back to visible when the sun comes up. Nice stuff... by far the highest quality satellite loops I have seen. Had those sites bookmarked since Hurricane Isabel in 2003.

BTW, as of this moment (6:35am EST), there IS NO mandatory evacuation order for New Orleans . This is coming directly from the mayor of N.O. on live TV (WWLTV) just 5 minutes ago. He said he may issue a mandatory evacuation order later today, but as of this moment there is none.