UPDATE: the latest version of the CC.NET Monitor Gadget for Vista Sidebar is v0.9.5: read more about it in 0.9.5 release notes.
Since many people asked for it, I just released a new version of the CruiseControl.NET Monitoring Gadget for Vista Sidebar adding the most requested feature: the Force Build button.
Now, in the undocked view, you can see a nice orange button on the right. Push that button to force a build for the project and the button will turn gray, meaning that the project is checking for updated or is already building.
This the list of changes:
You can download the new version from Google Code, or from Windows Live Gallery (before downloading make sure that the version is 0.9)