We have seen lots of these word clock builds. Our friend Muris has just completed his word clock build, he is using a ATmega328P microcontroller to command the 248 LED matrix to show the time and a little something special (watch the video at around the 32 second mark). Atmel AT42QT1011 touch sensors add a nice way to interface with the clock and I am impressed by the professional look of the final design. As usual the code and schematics are available so you can have some fun also. The wood work is hand done but the attention to detail makes it look like it was carved using a CNC machine. I vote for a CNC machine to be the next project that Muris does!