First came 802.11b wireless LAN devices a couple of years ago. Then 802.11a gear hit the market this year. And 802.11g products are slated to ship next year. As if that isn't confusing enough, 802.11b and 802.11a are incompatible, while 802.11g will be compatible with 802.11b, but not 802.11a. So let's sort it all out.