3D Flash
I'm still waiting for a good 3D engine for Flash, but it is perfectly adequate for a convincing fake. I have a wide range of 3D experience from POV way back in time, through 3D Studio, Alias Wavefront, Max and Maya.
Lacking any real-time 3D plug-ins, pre rendered 3D is really the only way to go with Flash at present. This basically requires a 3D rendered image sequence and the use of action script to target the right frame for a convincing pseudo 3D look.
A good example of this would be the Honda presenter character Dr Eams. Built as a stand alone player, all the head and hand movements are pre rendered and controlled by a sound files swf that passes mouth amplitude to control the voice to sound and action script functions to call the right head and hand frame sequences.