Palm isn't going to support it. Word is they will use its technology, and more importantly, its developers to create their new multimedia-oriented PDA OS. That's assuming they survive the whole Xerox patent on unistroke pen input lawsuit thing.
The word on open sourcing it is that there is too much licensed code to do it, and its too much work to sort out what could be released if they even wanted to.
It is a shame. BeOS is fast and has a nice clean interface. Mac finder folders crossed with Windows style taskbar. Unix shell command line.
Lack of driver support is going to kill it eventually, even for the existing users.