Microsoft: When will Office 2008 for Mac be Available?|
Microsoft's intent is to deliver the first Universal version of Office for Mac for PowerPC- and Intel-based Macs. Microsoft® Office 2008 for Mac is scheduled to be available in the second half of 2007. Office 2008 for Mac will allow Mac users to work smarter and more efficiently with new and enhanced tools that are simple, intuitive and easily discovered.
See the 1/9/07 announcement by clicking on this url.
The academic version of the software is usually available a couple of months after the announced release date for the commercial market.