Microsoft offered Mac fans both good news and bad news on Thursday, and it all depends on which version of Office for Mac one is using. The software maker said that it plans on March 11 to deliver the first update to Office 2008 for Mac, delivering several key fixes. At the same time though, it has again pushed out the release of converters needed by users of Office 2004 to read documents saved in the new XML file formats used by Office 2007 for Windows. "The team is mobilized to get Office 2008 updates out as soon as possible,"...