It’s no news that everyone from retailers to movie studios and electronics manufacturers wants you to buy a Blu-ray DVD player. They hit early adopters with “be the first on your block” ad campaigns, and now that the format war is over they’re still offering the kind of incentives usually seen when a technology is new: Just recently, Amazon started offering buyers of select Blu-ray players an $80 add-on bundle that would get their movie collection jump-started. (The titles included are a mixed bag, pictured, but $10 per film is quite a price.) Some of the incentives are a bit more thoughtful than usual. Martin Scorsese lovers who already own the standard DVD version of Gangs of New York, for instance, can ease the pain of buying a second version for Blu-ray by mailing in a coupon for a $10 rebate (other titles are eligible as well). A better development — financially and practically — is the new trend of “digital copy” bundling. Some movie studios are bundling second discs with certain Blu-ray titles that contain a digital file users can install on iPods for mobile viewing. Fox’s Juno was a prominent early example, but other companies — like Warner Brothers, with 10,000 B.C. and Lionsgate with the latest Rambo flick — are getting into the game. Hopefully, it will soon become an industry standard to let buyers own portable digital versions of the DVD movies they buy.