Bluetooth based projects :remote control for servo motor

Dc motors and servo motors are essential components for robotics projects. And most of the robotics projects become really interesting when the projects are wireless also. The most common wireless technology used till now was the FM or RF technology. But there are many disadvantages to using such analogue communication technologies.
Bluetooth is a short range digital communication protocol suitable for robotic projects. The remote control consists of a receiver and a transmitter. In this case we can use a standard bluetooth module as the receiver. The transmitter may be custom made from a bluetooth module, or a small program can be written on any smart phones with bluetooth capability. J2me and windows mobile are the best for this purpose. Symbian also can be used.