I've thought about getting this to drive a Nixie tube clock that I plan on building and using the Arduino to control the tubes.
I liked the idea of the RTC, that way when I power the clock I will automatically have the time. Just wondering if it's worth the $15 or if I should just get some push buttons to increment the hour/minutes and set it every time.
I do think though using the RTC breakout board from Sparkfun would save me a lot of code when I can just pull the values from the RTC, convert to binary and send off to the 74141 IC that is driving the Nixie.