Here's a setup that allows 8 analog inputs to be read by a single analog expansion pin (plus three digital outputs). You'll need to make a few firmware changes to make it function however so it won't work out of the box, but it's not that big a change. I can make a .hex file or a new source drop available if there's enough interest.
http://goo.gl/pIX5P
http://goo.gl/0sIGD
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