My power went out yesterday. I wanted a quick way to set all the house clocks accurately and easily.
I used the Mac's speech ability and scriptability to make a quick talking clock. I ran this script and turned up my speakers and set all the clocks in the house with ease:
while [ 1 ];do z=`date +%S`;if [ `expr $z % 5` -eq 0 ];then say `date "+%l %M and %S seconds"`;fi;done
Mac OS X Hints
http://hints.macworld.com/article.php?story=2011043006554823