Showcase: The Nation Weather Service (from: bgalbraith)
http://www.ajaxian.com/archives/2005/06/showcase_the_na.html
Brad Smith pointed us to the National Weather Service’s graphical forecasting webpage, which makes use of Ajax to do a sort of mouseover effect.
I think its great to see a government agency innovate with this stuff, but sadly, this site is a bit of an anti-pattern for Ajax usability as you are given no indication that the mouseovers trigger new content, and the latency makes the experience a bit dodgy.