January 24, 2013 at 8:58 pm #21155
I like both of the ideas– about alternating the dots, or not flashing them.
Another (more severe) idea would be to go into what we call “VCR mode,” where the whole clock flashes as though it has lost power and does not know what time it is.
Another (less severe) idea would be to use the “nightlight” as an indicator. If it’s in the slow-fading sleep mode, it’s had sync within the last 6 hours, if on steady, within the last 24 hours, and if blinking, not in the last 24 hours.
The lower-right dot is a little underused; it indicates AM/PM in the mode with the second spinner, and could be repurposed as well.