I know, times are not perfect for new ideas or features.
So this may be a just a reminder...
Anyway, I'd like to see the support for OBD2 adapters.
For those who do not know this technology, read some details here:
So in short, it is a small device that you plug into your car and get real-time information like speed, RPM, gasoline consuption and so much more. In some kind of manner you can call it ANT+ for motorized vehicles. Adapters are available on e.g. amazon for under 20€: http://goo.gl/i8TLZH
For development purposes, here are some further links to the topic: