Microsoft today announces the immediate availability of our Windows Phone Developer Tools for Mango. Go get these tools now, and you can immediately start building cool apps and games that take advantage of all of the new functionality we announced and discussed in depth at the MIX11 conference in Las Vegas in April.
We listened to what developers told us they wanted, and in Windows Phone Mango we’re delivering outstanding new features including background processing, massive Live Tile functionality updates, direct camera access, sockets, a new profiler and emulator, deep linking into apps, local database support, and a new web browser control based on IE9 that supports HTML5.
Concurrent with this release of the tools, we’ve updated our official documentation in the What’s New in Windows Phone Developer Tools topic in the MSDN Library, created 22 new code samples, and released 10 new hands-on labs specific to Windows Phone Mango.
We’ve also updated our Game Development page to highlight some of the new resources available for phone game developers using Windows Phone Mango. New game developer resources include an updated version of Game State Management, guides explaining what’s new in the platform (including the Silverlight/XNA Framework integrated application model and Visual Basic support), and more samples and articles.
By the way, a few people have pointed out that the API references and other developer documentation refer to Mango as version 7.1. I had heard this was the case, but that Microsoft would still market it publicly as version 7.5. (This is similar to how Windows 7 is really version 6.1 internally.)
Windows Phone Secrets 
Awesome. Thanks Paul. I was just reading the details from ZDnet.
Paul, I hear MS showed a bit more at it’s other events, though not much. Like in Brazil there was a shot of the Tasks/To-do list in the calendar app. And I think down in NZ they showed some other bits.
That makes sense. There was no formal Q&A or hands-on time with the phones, instead just a few employees walking around with a device. Anyone who posts a “hands-on with Mango” story or video at this point is just stretching things a bit, since no one was given these devices. But it’s very possible they would see things that Microsoft didn’t “officially” reveal yet.