Found this video, which you'll find interesting. Both old and new people coming to free software can learn with this, I think.
It's a panel discussion that happened at the World Summit for the Information Society last year (the one where Richard Stallman wrapped his RFID badge with aluminum foil as a protest).
Richard Stallman, Bruce Perens, a guy from Intel (lobbyist for "freedom of choice"), a UN person and Mark Shuttleworth speak and debate. Richard's talk was very powerfull! Also interesting was the UN person, which came just after the Intel guy, and smashed his arguments about proprietary software increasing the wealth of developing countries, with his own reports and came to a different conclusion: "Is free software the answer for development? In one word, yes!".
And yes, I see the irony of having to install non-free software to view this video …. But you can click the download link on the right bar, and download it.