FlashForward: The Complete Series is out on DVD in the US. If you shop at Amazon, please use this link to support the site.

TVOvermind and SciFiCool have some clips from the episodes and special features on the DVD here or here.

For those of you looking only for Dominic Monaghan material, watch videos these videos on the TVOvermind page: two (making of the pilot with interview), three (bloopers) and the final video on the page (a scene between Janis and Simon late in the series). At SciFiCool follow the titles. Other videos cover Mark, stunts and other actors.