I posted the follow two paragraphs in response to another post about an 802.11a solution, but I think it applies to your question, too.
I just went through an extensive search and decided to go with the 802.11b. It is much slower, but it will be compatible with the soon to be released 802.11g. The 802.11g will provide 54Mbps and connect to my 802.11b machines. In case you would like a recommendation, I purchased and recommend the Asante FR3002AL-1PCM. It uses a PCMCIA card in the router, and should allow for a card swap to the 802.11g when released.
You'll find a lot of very good information on <A HREF="http://www.dslreports.com/" target="_new"> DSL Reports </A>.
JCC
<font color=purple> I doubt, therefore I might be </font color=purple>