Microsoft Beta Release: docx converter for mac
Microsoft released a public beta of their docx to doc converter. docx (along with xlsx and pptx) are the new XML structered format for Office 2007 (windows). Office 2008 for Mac, which should bring the Mac version back to parity, is scheduled to be released later this year.
Release notes indicate an xlsx and pptx converter will be coming shortly. In the interim, you can download the free NeoOffice which is already utilizing the XML format.
Related:
8/19/07 - Microsoft updates their beta to include PPTX
