I just have stumbled upon this program, never seen it before.
A very-very nice one.
It shows the weather just like out the window.
There is a landscape and it changes along with the weather.
They seem to have it all - real cloud coverage, rain/snow, mist, the grass moves along with the wind.
The sun and the moon are real.
You can even roll the time back and forth to enjoy the sunset :)
A nice feature - you can scroll the time into the future and watch the forecast over the same landscape.
The program is for Windows only, but they have a widget for HTML pages.
This is the link: http://yowindow.com
What do you think?