One of the new tools in the CTMH 2011 Spring/Summer Idea Book is the Spary Pen (Item Z1380). They come in a package of 3 and retail for $3.95. They're great for adding a sassy splash of color to your artwork. Simply load them up with water and the reinker of your choice. Watch this video to see how easy it is.
And here are a couple samples I've created using my spray pens: