The site was made by the University of Central Florida. They collaborated with the University of Minnesota on the mapping system. The damage estimate thing is neat, but hasn't seemed to be super accurate based on what I have seen. It's good for a general idea in that area though.
So which way does the accuracy error lean, overpredicting the area of damage, or underpredicting?
Also, do you see any scenario where Wilma somehow winds up hitting the upper TX coast?