Today we started headlining Kang Su Gatlin's article, Profile-Guided Optimization with Microsoft Visual C++ 2005 on the Visual C++ Developer Center. You'll definitely want to take a look at this article for an introduction to this topic.
You'll notice that we're changing much of our naming on the site for the next version of Visual C++ from "Visual C++ Whidbey" to "Visual C++ 2005". We'll try to keep the codename "Whidbey" in at least the first reference to the product to help avoid confusion. You can find out more about future versions of Visual Studio and Visual C++ by checking out the Microsoft Developer Tools Roadmap.