See how the Google Nexus 7 transforms into a car's entertainment system
Every DIY enthusiast who also happens to be passionate about cars has at least once considered the idea of mounting a tablet into the dashboard of their personal vehicle. Just think about it: with its rich set of multimedia features, a tablet can be a great inexpensive in-car entertainment system, not to mention that such a modification would look über awesome, if done right. One can store their music and video files on the device and play them back through the car's audio system, use the slate's GPS and navigation features, or even play a game of Angry Birds if stuck in a traffic jam.
source: Sonic Electronix (YouTube) via Android Community
Things that are NOT allowed: