According to this post on Marcus Whitney's blog, it seems that Microsoft has been listening to the various other web development communities (PHP, Ruby on Rails, etc) and has started an initiaitive to inform developers about the integration of their favorite language with .NET rather than assaulting them with more ".NET is the way of the future" marketing.
Windows is making a strong play for the server market with their "Cross Training for Developers" program. And look at the co-sponsors: O'Reilly and Dr. Dobbs. Not too shabby.
Oh, and if you dig around on the site you will see tutorials on PHP, Java and Coldfusion. You will also see that if you sign up for three of their webcasts you will get a free copy of Visual Studio 2005, a free book and some other stuff that they don’t tell you about. What better way to fend off the IBM/Eclipse onslaught than start giving away Studio. Whoever said Microsoft wasn’t getting smarter with age was wrong.
It's an interesting tactic, and it'll be interesting to see how it turns out. So far, from what Marcus has said, it seems like a half-hearted effort - but that might just be because it's just getting the ball rolling.