I still use C++ since there still doesn't seem to be a better option for creating cross platform GUI apps than C++ with Qt. Desktop Apps are no longer 'cool' and other than Qt there doesn't seem to be much happening in the Desktop space. For scripting I use lua since it's a lot easier to embed than Python.
I use it somewhat. The core program is C++ / Qt. The data is all serialized using Qt data structures. Then I have python helper programs that read the Qt data structures and generate reports. It's not the most elegant solution but it was the easiest way.
