Ambient Devices is beta testing a new Ambient Clock. In true Ambient Devices style, the clock’s face changes color based on information drawn from one or more Google Calendars. The clock should also show transit time (based on Google Maps), but I haven’t been able to get that working yet.
The actual device does not yet exist, but a Google Gadget that mimics the clock’s interface is available. If the gadget proves to be popular, Ambient may manufacture the device in the future