CrossRoads:
Here is what you might have been thinking of.
http://tronixstuff.wordpress.com/2012/02/29/tutorial-analog-input-for-multiple-buttons-part-two/
Expand the network for the number of buttons you want to use.
I was actually looking at something like:
http://www.avr-asm-tutorial.net/avr_en/keypad/keyboard.html#adc
This one is for a 3X4 matrix and the math is a pain for selecting the resistor values. I was hoping some smarter folks than me figured out a way to use only 1 or 2 different values.