I just recently had the chance to really get my hands on Degrafa for a project and have seen some pretty good results. I wanted to create a small sample for some people that have yet to play with it and show some neat things like the SVG data for more complex shapes. I wanted to also show some masking in flex using mxml for some neat effects that involve some unique shapes.
The sample shows a button that is skinned with Degrafa that on rollover shows a toolTip panel. The process to create some unique shapes in Degrafa is a multi step process. You will need to take your shape into Illustrator and create a SVG file from the path, simply save the file as SVG. The Degrafa site has a nice video showing how you can do this. Using SVG Data in Degrafa
In the example you can see the top containers are transparent and can see through to the background, which is a Degrafa skin as well. So when you rollover the edit button the toolTip panel needs to be masked. So the mask is the negative of the button skin, making the toolTip panel roll down seamless.
Source - maskShape.zip