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.
Its not that I am expecting faults given there are now two Morgans in the garage or anything....
iPhone is now doing
Music
SatNav
Calendar (map/appointment to satnav)
Speed/Hazard Warning
Telephone/Skype/IM
ODB for error codes and information (MPG, gulp, me and the car)
Finding car parking