I recently bought an ELM327 v1.4 OBD II bluetooth adapter to monitor and in some cases modify the internal goings on of my car.
Just a quick note, the code to connect to the adapter is 6789 and not 0000 as suggested in some places.
Also the rumor about a virus on the software disc is true in my case. See screenshot from avg below.
I could not find any more info about it so it might just be a false positive, I have not verfied with any other scanner.
This will surely be interesting to play around with some more!