Pretty cool tool. I like the email referral functionality and the reading list -just wished the reader indexed outside MSDN Magazine and went back further than 2007.  

http://windowsclient.net/wpf/starter-kits/sce.aspx

The MSDN Reader allows you to browse through MSDN Magazine articles like never before. Read through articles, view figures and code snippets in an intuitive and easy-to-use experience. The complete source code for the reader is also provided for you

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Below is an example of the email the referral functionality created

Emailing: Story from MSDN Reader
Story title:
Team System: Custom Check-in Policies
Story description:
Team Foundation Server provides APIs that let you create check-in notes (categorized string data) and custom check-in policy implementations. These features combine to give project administrators better control over the group development process.
Link to web content:
http://msdn.microsoft.com/msdnmag/issues/07/11/TeamSystem
Click on attached file to open article in MSDN Reader