In fact, I don't see that Sun was any more of an open-source company than, say, Google (another public company that contributes to free software but makes its m

In fact, I don't see that Sun was any more of an open-source company than, say, Google (another public company that contributes to free software but makes its money elsewhere). And don't forget Mozilla, which might not be a public company (it's a non-profit foundation with a wholly-owned for-profit subsidiary) but is entirely open-source-focused and pays hundreds of people to work on free software.