Macworld reports that Microsoft will end its support of Office 2004 as of October 13, 2009.
"In line with Microsoft's standard Support Lifecycle policy, Office 2004 for Mac Mainstream Support will be retired October 13, 2009," the company said in a statement given to Macworld. "The MacBU is continuing to work on updates for Office 2008 for Mac and is hard at work on the next version of Office for Mac."
Microsoft is planning to release its next version of Office for Windows in 2010. While no details on a planned release date for the next Mac version have been revealed, Office for Mac versions have typically followed six months to a year after their Windows counterparts.