Ben Pritchard of the Pittsburgh Flash Users Group recently posted a cool add-in: Kuler Panel for Flash CS3. The extension adds a new panel to Flash which interfaces with Adobe's Kuler, allowing you to browse the color combinations from within Flash CS3. The best part, though, is that selecting a color scheme creates a layer with that scheme's name and then puts that scheme's swatches on the new layer. This makes using the schemes trivial, and is a great addition to the tool.
[Updated to reflect updated version of the panel, released June 7th, 2007]