Everybody likes weather forecast (excuse those few who
don't) :-) It's live it gives lotta details.
Weather.com is keeping up with latest technology offering webservices to the
enthusiast programmers. First step is to register
for free to get the PartnerID and LicenseKey. After that you can download
the SDK to get the full throtle.
You can get nice satellite images as well. This one
shows our sunny weather for today :-)
There is also an asp.net weather
server control you can download and play around.