Perhaps the Microsoft Virtual Earth team is too busy these days with 3D data build-out and GIS infrastructure opportunities to care too much about mobile. Despite spending upwards of 800 million on TellMe, which would suggest mobile local Search is a priority for Redmond, the latest commercial Live Search offering with Sprint A-GPS still uses TellMe's pre-Microsoft deCarta mapping service.
David Mitby from TellMe/Microsoft helped me with presentation content for my talk at Mobile Web Americas. The updated screen shots of Tellme Mobile on Sprint include Virtual Earth Maps. Bye bye deCarta