Gobe Productive, written by the guys who did the original Claris Works, was the main (maybe the only) commercial hit on BeOS. Later it was also ported to Windows. But still it died in the end, done in by the death of BeOS and dominance of MS Word. Gobe is going to open-source Productive, so it'll be available to anyone who wants to carry it on. And it is a really nifty office suite, not a heavyweight contender like OpenOffice.org, but still very capable for the vast majority of what most people need. (It's actually a lot of fun to use.) And since it's already been ported (and written for portability) the task of bringing it to a new platform should be many times easier than porting something like OpenOffice. Just thought I'd mention it, if people are looking at all the possibilities.
-- gary_c