Planamesa Software has released NeoOffice/J 2.1, a Mac port of OpenOffice 2.1 using a Java-based GUI. This release now runs on Intel Macs. New features in 2.1 include:
NeoOffice is catching up to Microsoft Office, though it's certainly not there yet, and I'm not sure it will ever get there. (Various look-and-feel bugs I've filed have been closed as won't fix.) Mac OS X 10.3.9 or later is required. NeoOffice is published exclusively under the GPL.