Ive been using alot of UART communication between my panda II and bluetooth, and from pc, vice versa.
But always pretty simple things, like sending a text. waiting for it, then maybe reply back..
But i just started on a small robot project, and i control my servos via bluetooth from my computer. (Virtual serial port, to my itead BT shield).
And i just send text commands like "up" "down" "left" "right" "stop" to control my servos.
but i now plan to add a ultra sound range finder (Paralax "Ping)))").