During the keynote, there was some information that the new Maps app would have user submitted traffic info. How? Will there be some type of auto uploading of my car's location, speed, etc. which would then be processed at Apple to determine that my current local is suffering from a traffic jam? Or is there going to be a button I push where I can upload and report on a traffic jam? Has there been any information on how exactly Apple is going to find out where the traffic jams are?