"Moving forward, we’re planning to create a “filter pack,” which will include these as well as other filters for other applications and formats (including TIFF). The release plan for the filter pack has not been finalized, but we will make an announcement on either or both the SharePoint Team Blog and the IFilter Team Blog at the appropriate time."
Also see workaround at the bottom of http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1417396&SiteID=1&mode=1
Cheers
Spence
www.harbar.net