I had the pleasure of meeting Brian Mackey (of The Revit Geek and Mackey Consulting) at RTC North America last year. He is a great guy and I can't wait to catch up again soon at some conferences this year! Luke, over at What Revit Wants, posted a link to some video tutorials that Brian posted. The videos talk about adaptive components...
Adaptive components are under the category of "don't really need to know" for most people... Until you need to know them! I promise you will not regret becoming farmiliar with adaptive components and these videos are a start...
Revit Tutorials - Adaptive Components (The Revit Geek)
