4x4x4 LED Cube with Charlieplexing

I know there are tons of ibles on this now, but here is the method I used to make a few LED cubes for my brothers this last Christmas. The electronics are cheap and it doesn't take much time to quickly make one of these. I wrote some very simple code to control them as well. I made a green one and a blue one. Both run on batteries (AA or AAA). I tried using coin cells but couldn't get them to spit out enough juice. You could definitely get the LEDs brighter with a more robust power source and transistor network, but that wasn't my goal.

// scratch that, they are plenty bright

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Step 1: Materials Needed

A quick list of the parts you will need for this design (or at least what I used):

ATMega328P-PU microcontroller
ribbon cable or individual wires (both work just as well) as thin as possible
64 LEDs of your color choice
9 resistors (100 ohm or 120 ohm or close)
optional] experimenters / prototype board

you will also need:

AVR programmer with ISP connection

I have the wrong resistors shown in the picture... It took me up until the 4th resistor while soldering to realize that I had placed a reel of resistors in the wrong place on my shelves. That's what I get for moving to a new room. I have 22kohm resistors shown instead of the 100ohm resistors that they should all be.