Heres some i saw in the uk:
on a porche, flying past at at least 90mph: R'5END (Ar** End)
On a yellow beetle, with a black stripe and 'beesting' arial on roof: BU51 BEE (buzzy bee)
on a driveway i deliver too: M12 ORD and M125 ORD (Mr Ord and Mrs Ord)
the one i want: M12 0ARN (closest i can get to MR DARN!)
on a satalite tv van: S4T TV
you got any?