On top of that we also have a web driven central task list type thingy, you dont have that as an option above - basically it's like forum
I just cover that sort of thing under forum.
For d) do you include "audio" conferencing (eg. via skype)?
Yes, phone is just audio, so audio skype is the same thing.
Email and phone, don't see it listed as a choice but it is the best.
I replaced forum and phone with that, interesting choice.