The Dashboard on OS X works as a sort-of second desktop, where mini-programs called "Widgets" live. Widgets are small, dynamic apps that can show often-updating information like weather or news updates, or even be a little calendar or calculator. Lots of users love the Dashboard, but I'm not one of them. It gets in my way when I accidentally activate it, either using keyboard shortcuts (common with Parallels, trying to emulate the "home" key on a MacBook Pro to get to the beginning of a line of text) or by accidentally swiping-right with three fingers on the Magic Trackpad.
In any case, I never use the dashboard. So I wrote this little utility to disable it. Run the program once to disable the Dashboard, and if you discover that you actually MISS it, you can run the program again and bring it back.