Are QT + mingw using c++0x ?

[tonnot]

And, do you recommend me to learn c++0x ??

[Zlatomir]

C++0x isn't a new language - it's still C++ with some new language features and some new libraries (and i think some other libraries moved from tr1 namespace to std namespace).

You can (and you will in the future) learn some features and most likely you can ignore some other features, you can read about C++0x here (on wikipedia) and here is Stroustrup's 0x FAQ.