The "g" standard is certainly far superior to "b" but until the standard is certified and Cisco begins selling it and companies begin using it, it wouldn't be of much value.

Large companies like the one I work for are very conservative. First they want Cisco to bless it, then they wait eons to install it. My guess is that it won't be widely available for at least couple of years.

Most people use "b" at home to share an internet connection. "b" is as good as wire for this purpose. The primary use of "g" at home is to faciliate a centralized entertainment source that can be pumped wirelessly around the house. Few will venture into this area considering the cost, complication and marginal benefit of an entertainment LAN.