I was browsing the EZ forum and saw some one mention the incredible distances that you can communicate with robot,RC vehicles,balloons ,drones...using the Xbee systems up to 40 miles range. I have both EZB-4 and EZB-3 and was wondering what could be done with the EZB-3 in a long range out door 4X4 roaming robot,has anyone ever experimented using Xbee communication and would it work with both my EZ3 and 4? Still love the range I get with the Wi-Fi on EZ4 but the range with bluetooth on EZ3 very limited so possibly adding a 1 mile Xbee wireless system would work for a better robot I am working on.Anyone have any experience? Their website at sparkfun looks highly interesting.I am also experimenting using the mobile phone app with EZB4 currently, but I don't have a cell network just use the EZB built in wifi server to communicate with robot. Just trying to find best way for long range robot control.