Best way to control a LOT of buttons/pots from a few ins/outs? (µC question)

So far I've found diode-matrixing for large numbers of digital controls : it's like regular matrixing, except that you put a diode in series with each control to prevent ghosting and locking.

Also, if the number isn't that big you can run both analogs and digital controls off a 4017 - just wire the 4017 outputs to where the +5V usually goes and then you're controlling 9-10 controls for each chip using only one input and one ouput.