The biggest challenge for open source is that as it enters the consumer market, as projects like WordPress and Firefox have done, you have to create a user experience that is on par or better than the proprietary alternatives.
Matt MullenwegI am an optimist, and I believe that people are inherently good and that if you give everyone a voice and freedom of expression, the truth and the good will outweigh the bad. So, on the whole, I think the power that online distribution confers is a positive thing for society. Online we can act as a fifth estate.
Matt Mullenweg