It has been a while since you asked the question, but I will add this answer anyway, this may help you or someone else.
I am also interested in Bluetooth HID emulation, ideally with some Java / Android codes. However, I came across this Python script / project:
http://code.google.com/p/hidemulator
I have not tried this code myself, but from what I see, the script is quite simple. It currently only supports the six-axis PS3 controller, but maybe you (or I, if I ever find the time) could adapt the keyboard and mouse routines for the Nokia project in a Python script (or convert it to Java / Groovy, which is my ultimate goal ;-)).
Greetings
Rich
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