Enterprises are reacting sensibly to the issue of low-speed (20 Mbps or slower) Wi-Fi interference techniques documented by Australian researchers: It's not so much a flaw as a part of the spec that allows a certain kind of attack to disable an access point; there are many others of varying degree of severity, too, including just bringing an unpleasant 2.4 GHz cordless phone into an office and leaving it turned on without a connection to a cordless base station.
The reaction cited in this Computerworld article is sensible: managers are examining their risk and noting that with many access points, an attacker would have to attack numerous locations at once to have an effect, and would then be vulnerable to physical detection.
All 802.11a and any 802.11g networks running at faster encodings (using OFDM) can't be attacked in this fashion, either.