Recently Aalborg University was appointed to be the official "UNESCO Chair in Problem Based Learning (UCPBL)", which one can read more about here.
As a part of this inititiative they have decided to create on online community, which will focus especially on PBL (or what is sometimes referred to as POPP - Problem Oriented Project Pedagogy) and I suggested that they could use Elgg for this.
This they found to be a good idea and they have now set up an Elgg-environment, which is for people interested in PBL (both online and offline). So if you are interested in PBL why not go have a look at the site and maybe register for an account :)
Keywords: Aalborg University, AAU, Elgg, PBL, Problem Based Learning, UNESCO