Apple dropped iPhone OS 4.0 on us last week in a big way, and we spent plenty of time breaking down and exploring the details. But, there are apparently a few gems left to be discovered, like dedicated support for in-car use -- possibly even with an Apple-branded mount of some sort. When put into this mode the iPhone generates a simple menu that's fed over video output (demonstrated after the break) while the handset becomes a remote control which may or may not be a good idea as more and more states ban cellphone use of any kind while drivin
