According to an article in News.com, Sun will do a port of StarOffice for MacOS X. This is interesting: it could signal yet another change in the relationship between Apple and Microsoft. So far, Microsoft has supported OS X, but if Apple keeps antagonizing them they might stop doing it. Since at the moment they control the most important office product, they have Apple in a corner. So Sun's entry might shake things up a bit, if they do the job right and on time.
I only hope that Sun is going into this to provide a good office suite, not simply to attack Microsoft. If it's the first, it will work. If it's the second, it won't.