That is an interesting problem and one of the more important one in the end for the long term viability of an open platform... If users can't get to the hardware it's game over. Hopefully hardware manufacturer could get pressured by such big players as Nokia to release source, at least a year or two after its bleeding edge chips are out ... ?
I'm wondering if, Nokia being at the center of the real platform direction / innovation, shouldn't right now completely aim for a 100% FOSS platform...
Maybe a temporary license where we can see the source but not share it might make sense so you can still sue rip-offs and after a while completely free it? I don't know what might work but it's worth thinking about ...
The proprietary possibility has to be left as to be able to create an app market for those who still think their great idea is worth 3.99$ and creating a real diversified market of license type.
it will take time to build a community for an e-mail client used on what is right now a fringe platform...
I think Nokia did a great job with the community and really is going in the right direction, it might just have to learn a few more things about how to deal with a community.
I'm wondering, is the new browser front-end (GUI) in Maemo not FOSS ? (I know the back-end now is, and that's great!) But, If not Why not? How is that different than the media player which is even more of a commodity to me?