There are actually two concerns about 802.11g. Concern No. 1 is whether the technology will work with legacy 802.11b clients; the big fear is that legacy 802.11b clients could be knocked off the air in favor of 802.11g kit in crowded networks. Concern No. 2: whether all 802.11g products will be able to interoperate, particularly with the number of pre-standard products being announced.