This made me think of the Whereabouts Clock: http://research.microsoft.com/en-us/groups/sds/whereabouts_clock.aspx http://research.microsoft.com/en-us/groups/s

This made me think of the Whereabouts Clock: http://research.microsoft.com/en-us/groups/sds/whereabouts_clock.aspx http://research.microsoft.com/en-us/groups/sds/whereabouts_c...