Widget Update will scan your Mac for any Widgets you have installed and look for new versions at Apple.com, DashboardWidgets.com, MacUpdate and VersionTracker. You will be presented with a tidy list containing links to the new versions' detail pages. The Widget comes with plenty of features such as Growl support, the ability to ignore updates, mark them as installed, ignore Widgets at all, override version information, being collapsed into a small icon to preserve space and much more.