Great interview. When asked about regrets and Jeffrey spoke about his degree (lack of) I had "If I Only Had a Brain" going off in my head. The degree provides validation from an institution and society. The value you bring surpasses that by a lot.
I also thought your discussion on Marketing was interesting. It is clear that part of the success of PowerShell is how a community has been developed around that and a viral marketing campaign began. Back to Power GUI and Dmitry Sotnikov and of course the band of merry nerds who evangelize PowerShell everyday. The marketing can't be overlooked.