I wouldn't do 802.11g quite yet, unless you enjoy having bleeding edge technology. I've read a couple reports on the latest 802.11g-type equipment, and they aren't all that rosy. The definitive 802.11g spec isn't finalized yet, so there are a few different 802.11g type standards. Buffalo and Dlink use
54g, Linksys uses
Wireless G, and I haven't found out what Netgear and Belkin plan on using. From what I've read, these bleeding edge devices operate smoothly only when using all same brand equipment, and without using 802.11b devices simultaneousliy. Go figure. And, none that I've seen so far guarantee real 802.11g spec firmware when it becomes available. Hmm... Linksys claims that their equipment is compatible with 54g stuff, as verified by
www.54g.org, but I can't find 54g.org. nslookup fails to find a DNS entry for it. Go figure.
Aside from that, in theory, 802.11g operates in the same frequencies as 802.11b (2.4GHz), so technically you should be able to get similar range, but it is spec'ed to 54mbps. It is also claimed to be backwards compatible to 802.11b networks if a g network isn't available. 802.11a is also 54mbps, but operates above 5 GHz. A will have much less range, but higher theoretical bandwidth if the signal is adequate.
In real world experience, I've seen problems with mixing brands of equipment, less range in some applications than you would think is acceptable, and difficulty in setup sometimes.
I would wait a few months for better 802.11g equipment than what they have now. But it's your call.
-ben