Maybe I'm the last one to find it but a great weather website is: http://www.wetteronline.com/sail.htm Lots of detail for the Med and UK as well.
David
http://www.greatweather.co.uk/ - this is the best one I've ever found for links to more in depth sites. That one you've found is certainly the best "at a glance" sailing weather site I've seen though.
All done automatically, chap that runs it recently had a few problems wiyh his internet provider so was resited. I think he's a glider/hangglider, anyway it's the best site I know.