Microsoft released their first version of Python Tools for Visual Studio on August 29. It is a free and open source IDE built on top of a free Visual Studio Shell. Basically, you get a familiar (not to me) interface of Visual Studio to manage projects and Python language support with Intellisense and Refactoring. You also get an interactive Python console, a debugger, a code profiler. Of course, you get IronPython support too.
In case you are wondering, this free tool works best with Visual Studio Ultimate. Thank you for your purchase.