how you make Windows Vista tell you the weather
The sidebar can add gadgets. One of the ones that comes with Vista is a simple weather gadget. Simply shows the temperature and a little graphic of what the weather is like. Currently looks like the moon, but earlier on was a storm. I also used quite a lot of stuff on XP for weather prediction (including add ons for IE and Firefox that show the next 5 days forecast at the bottom of the window).
One of the best was a DesktopX widget that showed two different locations at once. Was always fun to have Limassol as one of the locations, and Slough in the UK as the other. Mainly because I contract for the company I used to work for in the UK and is good to feel happy when talking to the main support desk woman there who tends to ask me "So are you regretting moving to Cyprus *yet*?". Yeah, yeah, it's hot and sunny, and I can see the sea and beach from the window that I work from (across the hall from where I sleep), did you enjoy your caravan holiday in the rain?
Cheers