I've built a very simple Windows Vista Sidebar Search Gadget a while back and just updated it to run on the Vista 5472 builds and above. Seriously, its VERY simple to write. I'm not a big fan of Javascript but there are tons of really smart and creative Javascript developers who can make wonderful gadgets.

 

Here are some really cool ones:

  

 

you can download these from http://gallery.live.com/results.aspx?c=0&l=1

Now we need to see what kind of cool gadgets we can write that has something to do with Windows Mobile. Perhaps a send SMS gadget? that'll be cool.