2011 Upgrades continue: Overlays are now live :)
Now you can customize your view. Simply click to turn an overlay on or off. Here is a recent true color image illustrating different overlays and combination of overlays. Overlays work on all satellite imagery, not just true color.
I came across an interesting discovery while looking at the RipCharts True Color satellite imagery this afternoon. I noticed this darker brown area along the coast caused (presumably) by Ike's storm surge. Its interesting to see that it stretches pretty far into Louisiana too.