Today is it, Windows 7 is out. As a Microsoft MVP I've been testing Windows 7 for a long time and I have been using it as my primary OS for several months. I think Microsoft has escaped the Vista demons and has a great OS to go to market with. I predict even folks who run Apple hardware and OSX will end up buying Windows 7 to run as a VM or in bootcamp and XP will start disappearing quickly from the landscape.
So to all my friends who work at Microsoft, congratulations, it is a big deal. I also am excited about Server 2008 R2 because of the some of the cool "better together" features that IT Pros will get with both products.