One of the questions was "how can you make a living if you work on opensource stuff?" Well, precisely, working on opensource stuff helps me to make a living. More and more customers are opensource-aware, and being actively involved in opensource projects is key in convincing them to work with us rather than with large IT shops.
I really think opensource is something that should now be part of what is taught to
CS students, so that they understand what it is, how it works and why it is important.