We'll have to find time for this - I don't know if I'll have time this month - but we can all at least start by taking a look in the Waze source code:
http://www.waze.com/wiki/index.php/Source_code
Now, I'm not quite sure which one of these versions might fit us best - but I suspect we can easily count-out the iPhone version as it uses a different input method than the rest of the versions (capacitive screen with multi-touch). I'm leaning towards the Symbian version, but if you got any other ideas we need to hear it...