I normally don't post my ODF Plugin news and information on GullFOSS, but so many people complain (everywhere, including in OOo mailing lists) about the bad ODF support in Microsoft Office 2007 SP2, that I thought it might be a good idea to post some information about the ODF Plugin here...
The Sun ODF Plugin for Microsoft Office, which is based on OpenOffice.org, adds support for ODF to Microsoft Office 2000 and newer versions. So you don't have to use the very latest Microsoft Office 2007 SP2 version (in case you really need Microsoft Office for some reason) , where ODF support is insufficient anyway.