Full-colour RGB 4x4 button pad (monome-esque)

ok, this cleared alot up, but i have a few more questions;

resistor values seem to be different all over the board, what values did you use for the led's to light up, and what values did you use for the pull down resistors?

Now the digital potentiometers make more sense, but what pin did you connect the second slave pin?
and if i understand, your explination means that both digital pots cant be on at the same time?
So they are switch to and from very quickly im guessing.

And the code posted up top, Is it the code for the first video on the page? where the one color gets sent to all the other colors when pressed?
Also, how do i work with the code, meaning how do i make random colors appear? and how do i change individual buttons colors? The code is interesting, but very confusing, which means you did a good job shortening it! If i cant read the code, it means it's good, so don't worry, im just noobish at c... but i'm learning.

Thanks alot for the help already, and i cant wait to get this up and running hopefully tomorrow when my rgb led's get here. Stupid mail took almost 2 weeks to get them here...

Good luck with the future of this project!
-big93