Longhorn evangelist Karsten Januszewski delves into one of the most overlooked but important pillars of Longhorn and WinFX, The Fundamentals, on his blog

"The Fundamentals Pillar of Longhorn has received far less attention than the other pillars (Avalon, Indigo and WinFS).  This is a shame, because the Fundamentals deserve equal, if not more, attention as the other pillars.  In fact, the Fundamentals are arguably the most important pillar, in that advances in this area are the foundation of the OS.  "Nailing the Basics" is priority number one for this next release of the OS.  With this in mind, I'm going to start enumerating the different aspects and innovations within this pillar."