I'm trying to stay up with my C++ and build a small portfolio of code that I can show potential future employers. I have been looking for small projects to do that can help me practice different aspects of the language. I raided my old C++ prof's website for his assignments and projects from this year, as well as porting all of my old Java assignments to C++ and converting them to use the STL/Templates and the like. Are there any good websites where I can find other good programming excercises to do?
Other then that, my suggestion would to just do whatever you want, i.e. if you want to go make a 2D game, go start SDL and try that, or make an epic Nethack clone.