If you're determined to jabber on your cellphone while driving, there's no shortage of devices that purport to make
it easier and safer. One that seems more useful than most is this Bluetooth rear-view mirror, which includes a
speakerphone and integrated caller ID display, so you can check the numbers of incoming calls with a quick glance. It
may not be a perfect heads-up display, but it looks like it comes pretty close.
[Via Tech Ticker]