Our Weblogs, Inc. buddies at Download Squad bring us this news: OpenOffice is going to be able to run natively on the Mac in 2008.
The OpenOffice suite is getting pretty impressive-- while Writer, Impress, and Calc might not be necessary when you have Pages, Keynote, and Numbers around, OpenOffice's Math, Draw, and Base will probably be welcome additions to a few Macs out there. And don't underestimate compatibility-- back when I had to use a PC at work, OpenOffice was a constant tool, and using the same program at work and home has its advantages for people who are forced to co-OS.
If you can't wait another year, there is still an alpha version available of the native port, and you might be waiting even longer than 2008 anyway-- we were promised a native port a year ago that apparently never showed up in full form. And don't forget about NeoOffice, either-- it's a very nice branch of the OpenOffice code that already natively runs on the Mac. Why wait for OpenOffice to get in gear when those folks have been punching out a native app for a long time now?