Let's Make Robots!

multiplexing

Analog multiplexor (possibly i2c)

Hello! i have almost finished my analog inputs on my last project.. i have only one left and i need to attach some potentiometers to do some calibration.. I could really use some nice multiplexing. What i'd like is a chip with some analog inputs and possibly an i2c interface so that you can choose which analog pin to read and get a digital reading. Do you know if anything like this exists ?

Can you work with LED???

Can you make a 3d LED cube with an Picaxe 28x1.  Like a 3x3x3 or bigger.  It something second I would love to do.  Robot is the first thing I want to do but learning more about LED and wanted to know if it is possible to do something like this.  I can't wait till I place my order in soon to get this and share my project with everyone.