Brought this module from ebay and they look promising.
They convert Serial to Bluetooth, which could have many embedded uses.
They are known as MDFLY, there are also Spanion ones out hter which are faster [source]
The main chip is a CSR BC417 and the other chip is a 29lv800c Flash.
AT Command Set: http://mdfly.com/Download/Wireless/BT0417C_ATcommand.pdf
There are a few guys hacking them at the moment