Updated Sep 15, 2012
This kit is sold now by wyolum.
Here you can buy a complete C3Jr kit, that will make a wonderful word clock once assembled (assembly instructions here). All you need is a soldering iron and some (almost trivial) soldering skills. The kit comes with the ATmega328 processor already loaded with the latest sketch (no need for you to program it).
Please contact me if you want an assembled and tested C3Jr.