A Blu-ray "upgrade kit" for Apple's revamped Mac mini sounds like the ultimate for home theater buffs right? After all, such a device holds the promise of adding Blu-ray playback to a relatively powerful, off-the-shelf micro computer starting at $599 that'll run any of the amazing media center apps available for either Windows 7 (with some extra legwork) or OS X. Not so fast bub, remember, OS X still do