With the high price of gasoline today, who can afford to idle in traffic? The newest car navigation device from TomTom, the GO 930, uses data that calculate the average speed of traffic on your route to give you a more accurate estimate of your travel time. Where does that info come from? Other users whose devices are anonymously sending the information to TomTom central. (This occurs when you hook your TomTom to the Internet for downloads etc.) Another cool upgrade: The device points you to which lane you should drive in for merging, exiting etc.