When I first got a taste of Mac OS X via bookah, I sorely missed the tomboy application. It is a personal wiki of sorts, and could readily kick your current post-it note app. It was only available on the linux platform and uses GNOME-Mono combo and is generally Beagle friendly. Tomboyless, I immediately felt the urge to port or manage to create something similar on OS X but as always haven't managed to find the time to do so (as if).
While browsing to Apple's dashboard download repository this morning, I stumbled upon inkspotting : WikityWidget
Problem solved. Works nicely and best of all FREE! It doesn't support Spotlight at the moment, so you search using the widget itself. Still, all in all a nice addition to my dashboard collection.