Assuming that you keep your schedule in Google Calendar (and really, who doesn't these days?), you can link it up the Ambient Clock (via Ambient's "nationwide wireless network") to find out what your schedule is. Meaning, a quick glance will help determine when you have scheduled events (the block rectangles on the clock) and the clock itself will change color if you have an upcoming appointment. As of right now the Ambient Clock isn't actually in production, although there is an online beta so you can get a feel for the features and help the engineers decide certain aspects of the build.

http://www.ambientclock.com