The third Brink video dev diary is now online and explores how Brink goes about blurring the lines between single player and multplayer. Titled "The End of Genre As We Know It," the diary also goes into the inner workings of Brink's missions system and features the healthy mix of interviews and gameplay footage we've come to know and love.
http://www.splashdamage.com/content/latest-brink-video-dev-diary-melds-single-and-multiplayer