The addition of a digital compass to the iPhone 3GS has turned it into an essential city navigation tool for many pedestrians, but what if you're more commonly found on a bike? Japanese firm Ubiquitous Entertainment have put together a prototype called iPhone ARider, which uses a retractable head-mounted display and a 3GS to show live navigation to a biker.
Video demo after the cut
The iPhone 3GS is mounted on top of a helmet, and uses its GPS and digital compass to fix a position. Meanwhile the display - a Scalar T3-A - shows the same mapping data in the corner of the rider's eye. The setup also allows for hands-free calls, via a Bluetooth headset, and Twitter notifications.
The mapping app used is actually a custom one, rather than Google Maps or anythign from the App Store, specially designed to work with the T3-A eyepiece. Of course, the iPhone 3GS is pretty precarious up on top of the helmet, so we're glad this is just a prototype.