I had a look through the Interweb today and found an iOS solution. It would appear that there are not any approved iOS Bluetooth solutions.
I have ordered the Kiwi PLX 2 WiFi ODB Interface, its not cheap at around £100. This links onto the ODB port and then provides a WiFi interface for an Ad-Hoc WiLAN to the iPhone/Pad. I will be testing it with FuzzyCar and REVs.
Hello All,
After doing some research on the internet and once I ruled out bluetooth devices for my iphone [:-/], I finally ordered a WIFI dongle through Amazon ("ELM327 WIFI Wireless OBD2 OBDII Car Auto Diagnostic Scanner Adapter Reader") which cost me £23,98. I downloaded an app called Dashcmd for £8 and Bingo

All engine data is now available, mostly fuel consumption and efficiency, available torque, diagnosis tools and shifting points.
The only thing I'm trying to figure out now is how to use the dongle in conjunction with my GPS app (Waze), as wifi seems to automatically take over 3G, which cuts me from the network... any ideas on that topic are welcome ;-)
Cheers