Where is a good blog or website to read up and keep track of the new 802.11ac in development?
There is some info here: http://community.arubanetworks.com/t5/802-11n-Basics-RF-Design-and/802-11ac-basics/td-p/19962
You can also create your own google trigger for 11ac or 802.11ac and let google do the hard work for you lol.
I will be posting a blog later this week, "802.11ac: Just the Facts," which will hopefully become one of the better nutshell summaries of the amendment for people new to the VHT PHY. It will be followed later in the summer by a larger whitepaper going into much greater detail about its operations and integration features for backward compatibility with older 5 GHz PHYs.