The October 2008 MSDN Magazine issue just went live with 5 articles on concurrency, plus the editor's note.  Four of the articles are written by members of the Parallel Computing team here at Microsoft, including one by me:

• Paradigm Shift: Design Considerations for Parallel Programming, by David Callahan.  David is the dinstinguished engineer responsible for setting the overall direction for the Parallel Computing team (a group of ~100 people) and indeed the whole company vis-a-vis parallelism.
• Coding Tools: Improved Support for Parallelism In the Next Version of Visual Studio, by Stephen Toub and Hazim Shafi.  Yes, we'll actually have IDE support for all of the cool new stuff we're shipping.
• Concurrency Hazards: Solving 11 Likely Problems in Your Multithreaded Code, by yours truly.  Although we make things simpler in many regards, there are still some gotchas to be aware of when writing parallel code.
• .NET Matters: False Sharing, by Stephen Toub, Igor Ostrovsky, and Huseyin Yildiz.  It's surprising sometimes how much of a bottleneck the memory system can become in parallel programs, and this article offers some insight and tips about how to deal with it.

Enjoy the text, and be careful not to overdose on the excess of parallelism goodness. This edition was timed intentionally to coincide with the PDC.  I'm hoping to see you there, because we have a plethora of exciting things to show, spanning managed .NET and native C++ programming.  These articles are really just teasers.