A few weeks ago the University of Minnesota had Dr. John Raven (son of the test author) provide an online lecture on the Raven's Progressive Matrices and the Flynn effect. The webcast has been archived is available in full. It is quite upper level and test design driven as opposed to utility based. The start has a bit of a history of the test that was fairly interesting. You can CLICK HERE to view the 90 minute lecture (complete with an archive of the slides and the chat).
It appears that this presentation may have been born out of an educational debate that is ongoing between Flynn and Raven. You can read a bit of the Raven's side of the debate at THIS WEBSITE. I have not had a chance to read over either of their sides so I cannot comment on either sides at this time.
