NewEgg.com, perhaps inadvertently breaking the news, is listing that a Microsoft Xbox 360 wireless N Networking Adapator will be going on sale today for $100.

The adapter, which shows official Microsoft packaging and uses model number PHD-00001, is said to increase the speed, range and wireless security features of the Xbox 360 Wireless Adapter.

Here are the specs:
Dual Band
5GHz: 1x2 (802.11a & 802.11n)
2.4GHz: 2x2
2(Tx)x 2(Rx)
7x faster than 'G'
2x the range of 'G

With the official pictures, model number and the roll-out of more HD movies, I can't imagine this release date isn't true.

Microsoft XBOX 360 Wireless N Networking Adaptor [NewEgg, thanks S ]