It’s always been strongly hinted at, but today at the Consumer Electronics Show in Las Vegas, Microsoft’s Robbie Bach has confirmed it: Project Natal will be out this “holiday season”.
https://kotaku.com/ces-2010-keynote-starring-microsofts-steve-ballmer-5441991
Nothing more specific than that was offered, but we take “holiday season” to be “November”. Guess the motion-sensing peripheral’s other important aspects – namely its price, included games and final name (remember, “Project Natal” is just a working title) – will have to wait for E3.