Tim Ewald and company are doing a wonderful job of overhauling the MSDN website. One benefit we can see right away is in accessing the documentation for the BCL. The news broke over at Junfeng Zhang's blog. See the comments for all the details, but suffice it to say that appending a namespace or class to http://msdn2.microsoft.com/library/ takes you to the documentation for that item. I'd love to see the source for the HttpModule they implemented this in.
Corrected spelling of Junfeng's surname. Wouldn't it be nice if the ActionScript reference followed the lead here?