Recently I found this good site so decided to share and my work.
After wifi robot III (other versions are in my site http://msp430.tk) version I have decided that wifi router is super un-economic :). Lafonera eats 5W. So I have ordered cheap Bluetooth ttl adapter. Here is last tank chassis upgrade, by the way, best and stable. Bike chain tracks are good in corners plus in this chassis setup exists some kind of amortization :) Tank control is via android device (simple arrows UI control).
so here are some photos: