I thought it was common knowledge that microsoft is announcing the RTM sign-off on Monday 7-13-2009. This has been known for a while.

WZor.net has more information but they should be choosing which candidate build is the RTM shortly, and then an officially announcement will come Monday.

I suspect this is the right answer.

Given we've also seen a slight reshuffle of their web app (dropping the beta logo for example) in the same week.