Thanks Sids, looks like I'll be getting one of those radio controlled Casios soon then. 
I've always been obsessed with the accuracy of time pieces. I think it's got a lot to do with my reliance on public transport. Yes, most people woud say that public transport never runs on time in this country, but on the occassions that it does being 30 seconds late could mean catching that train and missing it.
Also use to be fascinated when I was a kid with how accurate time keeping is used in radio and television broadcasting. When I visited a local BBC studio I remember chating to one of studio managers who explained that the clocks around the building were synchronised via the time signal derived from the (Ceefax) teletext signal, but due to the delays introduced by the broadcast chain this could mean that the clocks could be upto 0.25 seconds out which in certain scenarios was unacceptable!