Office 14, the follow-on to Office 2007, is due out in the first half of calendar year 2009, according to a slide deck allegedly from Microsoft, posted on the AeroXperience blog.
The timeline states that the first beta of Office 14 is due out in the first half of calendar 2008. The second beta is slated for the second haalf of 2008. This year, the plan is to "lock" certain "key innovation areas," the timeline states. ZdNet