Works fine in my 05 Toyota Tundra. The navigation model number is E7009 (the unit actually came from a 07 Solara)
Only issues, I cannot transfer the address book, hopefully will be fixed by apple (why wouldn't they??)
Also cannot listen to Visual Voicemail over the bluetooth in the car. I can select the car bluetooth in the list (speaker, headset, phone, and car) but it does not "activate" the navigation unit to play the bluetooth signal. Hopefully will also be fixed by apple.
The navigation displays the battery life and signal strength fine.
Still trying to figure out the dock connector pinout so I can change my custom car harness to allow the iPhone to disable it's own speakers and play through the dock connector line out.