For nearly all Audacity Google Summer of Code project ideas, wxWidgets and C++ programming are essential. Some projects need additional skills too.
Students who show that they have experience with wxWidgets will generally be at a considerable advantage to those who don't. Whilst Audacity is multi platform, it isn't necessary to be programming on all three platforms (Windows, Mac, Linux), but some familiarity with all three will make things go more smoothly.
We don't demand a daily blog or endless status reports. We do want to know what is actually going on, and if there are problems, to know them early. If there's problems with your mentor, or CVS won't accept any of your check ins, will you get this across to us?