Tree Navigation Workin' (mostly)

SoI've spent some time fighting with flash, but I've got this tree/node navigation thing mostly functional. Click a node and it sends out all of that node's children (to eventually be determined by XML), click a sibling of the original node and that siblings children will come out as the others go back in. Click a parent and all of the parent's descendants are removed. It has some serious bugs at this stage, but I'm really happy for the most part. Anyway, updates should be imminent, working demo and source are here