Nigan tipped us to a simple open source Bluetooth stack for embedded devices, the SmallTooth:
A newly developed open source Bluetooth stack for PIC32/24
* The code is really easy to understand, very well documented and really small.
* Designed to be extended and ported.
* Works straight out of the box with the PIC32 USB Starter Kit II and should be fairly simple to port to other PIC32 or PIC24 boards.
Via the forum. Thanks Nigan!