The dice tower is mechanically and electrically complete now. I also developed the initial version of the firmware to test out how much sound I can pack into the little ATmega328 flash and if the voice can be understood consistently.
I am happy with the result so far. Here's a quick video demonstrating it.
There's a little more work to do trying to get all the audio packed into the flash that I would like. I got a few tricks I'd like to try. I also need to add some power management to the code so it will last a while on batteries. Look for another update in the next week or two.