B is 11 mb, max. G can go up to 54 mb and has more range than B, but is an upgrade of B. If one B client attaches to your G network, everything reverts to B speeds. I have to assume G+ is the upcoming WiMax. This will extend the range of G to 30 miles. WiMax has not been fully ratified yet. There are still competing camps as to the format. It could still change.