Page 46 of the G1 manual indicates that going to the 'SD Card and Phone Storage' settings menu will give an option for 'Use for USB storage'. Ticking this box will allow the phone to show up as a mass storage device when connected to a PC. However, I do not have this option in my menu. Does anyone else have it? Is there something I need to do before hand?

I have confirmed that I have the latest UK update (TC5-RC8) and that I have an SD card that is fully usable by the G1.

Thanks