Rick J. Block has been speaking on RDA for some time now. I recently came across his website via William Denton’s FRBR Blog. The page is entitled, RDA: Victors or Victims. This is actually a presentation that Rick did for the New York Technical Services group. Last year, he presented, RDA: Boondoggle or Boon? at the New England Technical Services group.
At both links provided above, you will find not only Rick’s Powerpoint (in PPT or PDF format) but also a list of information on RDA ranging from articles to blogs and discussion lists. This is another great source to get information on RDA, FRBR, and FRAD.