In the past couple of weeks, Information Age Education has made substantial progress in editing and updating its IAE-pedia. I believe the entry on Digital Filing Cabinets is one of the more important entries in the IAE-Pedia. See http://iae-pedia.org/Digital_Filing_Cabinet/Overview.
The idea is very simple. We now have quite good technology that makes it easy for each preservice and inservice teacher to accumulate a personal library of “good stuff.” I call such a collection a Personal Digital Filing Cabinet.