In 2011, Alan Moore talked at Oporto about Coleen Fitzgibbon's film "LES," made in 1976 with a number of people who would soon form Colab. The script for his talk -- informal, with numerous links to videos online -- is posted here.
In 2004 Alan Moore was interviewed about Colab by Lori Waxman for a project Rob Storr was directing for NYU. That interview transcript is posted now.
Also, before that, Moore interviewed Gary Morehead, who for a couple of years lived with Lee Lozano, an important NYC artist who interacted closely with Colab members in the years before the group formed. That interview is posted here.