| chevy, I rip my DVDs to my hard disk using Handbrake so that I don't have to carry them with me while traveling, which I do very regularly with my iBook. And, with Front Row, it is a jukebox! (Allbeit a slow, poorly-designed one, better to use Finder and VLC).
Also, regarding unlocking a DVD... A mechanism to lock DVDs doesn't exist, to the best of my knowledge, at least I've certainly never encountered one. If one were so inclined, I don't see any (technical!) barrier to ripping DVDs from Blockbuster willy-nilly. Naturally, such a practise would be a violation of copyright laws, and so not recommended.
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