When Flash Player 9 is all the rage (i.e. when Flash Player 10 is released) then maybe I can hit Flex dev again in earnest. This is a cool little mod on the tree component built into Flex. No code is available but there is a plug for a commercial version.
The Flex 2 component set includes a Tree control, but it doesn’t have the built-in ability to display checkboxes next to the individual nodes. Since I needed a checked tree control for a project of mine, I went ahead and built it.