WildTangent's fearless leader decided to help us out by demonstrating the Web Driver's ability to query and manipulate promoted actor bones through API calls. This should provide you with a few moments of entertainment, but I must issue this warning: DO NOT TRY THIS ON THE REAL ALEX!
Bones may be promoted in WTStudio (in the Skeleton fly-out of the Actor properties panel) or with the 3ds max and Maya Exporters (from the Actor Properties flyout of the exporter panel). Once exported, the bones can be retrieved as children of the WTActor object and manipulated as a WTGroup object. Bone promotion is computationally expensive to provide so it should be used sparingly.
In the above example, references to each bone group were retrieved with WTGroup::getChildByIndex. WTGroup::getObjectByName may also be used to retrieve a specific named child bone. The bones themselves may not be picked unless geometry is attached to them. In the above example, spheres were attached to bones for picking.