Finally there seems to be a date being referenced for this to be released, see Mart Muller's blog

 

It should be released on 12th September with 6400 bug fixes.
Lets hope they stick to this date, I was originally expecting this release for the end of July.

 

Darren Strange has also posted about the fact that the Final Release date should still be November as MOSS is on the price list for November see his posting here.

 

An internal email from Chris Capposela (head of IW) to field sales confirms that 2007 will get added to the price list
in November.  This is excellent news and a strong indicator of our confidence.  That said, usual caveats apply about
how product performance and quality will ultimately dictate availability.

Our development schedule remains on track to deliver the 2007 Microsoft Office system by the end of 2006,
with broad general availability in early 2007.  Feedback on quality and performance will determine the exact dates.