That's very slick..........so I'm assuming that the workaround/side-effect you found is that any time the phone is connected to an HDMI cable and detects that it is docked, then WebTop is an option for launch?
Shame they did away with a magnet to trigger the docking event like they had with the original droid, d2, dx, etc. All you would need is a small magnet and an HDMI cable for WebTop.
I guess Moto probably knew this and figured they had to change the design in order to successfully squeeze you for the accessories to enable the feature.