I work on an open source tool called gem5 (http://gem5.org). It's a tool for computer architecture research. Basically it simulates processors, caches, memories, networks, devices, etc. in detail so researchers can figure out what features go in the next generation of processors.
We have a development mailing list that is pretty active. The members are both developers and users since users almost always need to write code to model some new component. Many questions are pretty specific to the tool, but many questions get into the guts of C++ and the CPython API.
So, my question, would it be appropriate to direct people to stackoverflow to ask these questions? Should I instead apply to have a new stackexchange site?