The arguments are being made, and not just by the stereotypical open source advocates: some big-name industry analysts are suggesting that Flash Player should go open source, and that it won’t have the negative impacts that I and many others worry about:

• Anne Zelenka: ”Why Open is Good and How Open Could Be Good for Flash” (and it’s predecessor, linked to from that article).
• Ted Leung: ”Adobe wants to be the Microsoft of the Web” (and its followup article, linked at the bottom)
• Ryan Stewart: ”How Adobe can overcome the issues around open sourcing the Flash Player” (he previously stated that Adobe shouldn’t open source Flash Player, so this is an interesting article with some new ideas I hadn’t seen before.)