Users regularly cite lack of compatibility with Microsoft Office files as a reason for not using OpenOffice.org. OpenOffice.org does include Microsoft Office export filters, as well as a number of settings for increased compatibility, but these features provide only good, not complete, compatibility. For this reason, Sun Microsystems' ODF Plugin for Microsoft Office, released earlier this year, sounded like good news. Promising export and import filters for Word, Excel, and PowerPoint, the free download appeared to tackle compatibility from a new but promising angle by giving Microsoft Office users the ability to open and save files in Open Document Format, the default format for OpenOffice.org 2.0 and higher. Unfortunately, the plugin is designed for older versions of Windows and Microsoft Office. If you're using the increasingly ubiquitous Vista and Microsoft Office 2007, the plugin delivers only a fraction of what it promises.