I thought this was very interesting. Nothing earth shattering, but rarely do personnel men speak candidly about the combine, the draft, free agency, and some of the metrics they use to evaluate players. The panel consists of personnel men from the Rams, Patriots (Scott Pioli), and the 49ers and one of the Football Outsiders guys
This is from an MIT conference on sports from last April.
Start it at 1m48s if you'd like to skip the introductions