The new wireless draft standard, 802.11n, failed on its first ballot through the IEEE standards process. In order to pass, the draft standard needed at least a 75% approval rate by its members; instead, it received 46%. According to an article in ExtremeTech, technical draft standards generally go through this process a few times before being ratified.
On the consumer side, be careful if you are purchasing “802.11n-compliant” equipment. This is equipment that is built to the draft standard. It will be called “802.11n-compatible” when it adheres to the ratified standard.