City of Santa Monica Parking
If looks were everything then this Google Maps mashup of available parking spaces in Santa Monica wouldn't win any awards. However as far as functionality and usefulness go this site is a clear winner.
The map shows at a glance how many parking spaces are currently available in Santa Monica's car parks. For example, in the above screenshot you can see that the library car park is full, whilst the car parks around it still have available spaces.
If you mouse over any of the yellow links for a car park an information window opens displaying information about the car park's capacity, opening hours and exact address.