According to a blog post by chairman of the 802.11n Task Group Bruce Kraemer, the IEEE has approved the 802.11n high end wireless local area network standard. Seven years ago, the first draft of this networking standard was submitted to IEEE for the approval and after several revisions of drafts now its finalized.
The 802.11n has capacity to deliver speed up to 300 megabits per second or higher, that is much more as compare to 802.11g standard, which works over 54Mbps speed.
According to Wi-Fi Alliance different manufacturers already rolled out the devices from last 6 years which are 802.11n-based and called N draft series but now after the final decision of IEEE most of those devices could be upgraded through firmware to the finalized 802.11n standard.
Publicly, 802.11n will be announced on September 15, 2009.