I was just thinking. Oh no!
Well, what I was thinking about is because the new ez-b runs on wifi, it would be compatible with wifi range extenders. This, depending on what kind of range extender you get, could double(if not close to triple) your range on your bot.
Wifi range extenders range from $20-$100 depending on the range and maker.
Setup #1: Many times the range extender you'll see has an adapter power cable to regulate the outlet power down to 12v dc.(amps unknown). So, you could use it on your 12v bot!
Choose wisely when choosing your extender because some may run on more than 12 volts. Also watch the amperage.
Setup #2: The other way you could setup the adapter is in the middle of the area the robot will be traveling. Then connect to the extender from the computer and then to the ez-b.
Connecting different brands of extenders to the ez-b may vary so I don't plan to cover that.
Anyone who would like to add on feel free.