I always have my phone mounted in a car kit with the display on, so I am trying to think of some useful widgets to have running while driving.

I was thinking a "Shazam" widget would be good - allow you to identify the song being played on the radio, as these days I find the stations are hopeless at back announcing the tracks.

Not sure if this is more of an app than a widget. Also, I don't know how a developer could tap into the song database ???

Perhaps a GPS speedo widget might be interesting - show your speed as calculated by the GPS - I suspect this would be more accurate than my car speedo. Maybe also show average speed, distance travelled or distance to home/gps co-ords (as the crow flies - not using maps).

What about a Widget that shows the Traffic updates info that newer GPS system use ?