Quietly and (apparently) without fanfare, JetBrains have released ReSharper 2.0. Those of you used to 1.5 will find that the new version is extremely feature-rich, but also radically slower than 1.5; I seriously hope JetBrains are aggressively optimizing their plug-in, because on large projects it can become quite sluggish.

That said, the huge amount of new features as well as Visual Studio 2005 support are a definite reason to move to 2.0.