As written in the introductory article for the WDTV Tools VMware Image I’m writing a series of tutorials for it. The first tutorial is available at the WDTV Tools Wiki. The tutorial describes how to compile new kernel modules for the WDTV and demonstrated it by adding Bluetooth support.
A future tutorial will show how to compile Bluetooth software and create an application image that contains all the software required to interface the WDTV with other Bluetooth devices.