Where should I start Game Dev now?

So, I have CS degree, MMO dev experience in a native language (think WoW and its scripting language (LUA?), except standalone,) and a lot of 2D games developed in C# XNA.

I want to move to C++ but I'm not sure where to start. At the moment I'm looking at GameDev.net.

If you want to learn C++ read:
+ TC++PL
+ C++ Concurrency in Action
+ ISO/IEC 14882

In that order. Do not read anything else till you have finished those. Certainly do not read blogs or forums, certainly do not ask questions online, 90% of what your read and the answers you get will be wrong.

If you don't know how to organize large programs of many characters of text and systems of thousands of run-time objects towards the purposes of an interactive simulation, I recommend you download Pharo Smalltalk and open up the browser and study closely the design of Morphic.

If you like this sort of thing you can study it's predecessor the alternate reality kit:

http://www.open-video.org/details.php?videoid=8050