In return for helping out at Makerfaire Eindhoven, Pieter from Floris.cc gave me a Alpha Clock Five kit from Evil Mad Scientist.
The kit is very well documented (schematic and sourcecode), uses only though hole components and is easy to assemble.
Aside from the Atmel and Chronodot stuff it uses two interesting IC’s : Macroblock MBI5027 and Macroblock MBI5168
Another nice thing about the Alpha Clock Five is the Serial protocol that allow you to control all aspects of the clock.
The software is really polished, no flickering display, nice gradient while dimming, user definable characters. The only thing missing you could possibly want is different intensities per segment.