On his latest show, Mark Gillespie's WhiskyCast podcast has some decent coverage of the gathering for Parker's 50th anniversary party. It includes a lengthy interview with him--I enjoyed the sound of Parker's voice. It sounds like he was enjoying himself that evening--if you know what I mean. Or does he always sounds that way? Mike Veach makes a brief (vocal) appearance as well.
On a separate link, Mark provides the speech Parker gave that night. I haven't heard it yet, but look forward to more of the master distiller.