Responding to an email about the inability to use Firewire HD camcorders with the new MacBook and iMovie, Jobs (more likely one of his minions) replied:
Actually, all of the new HD camcorders of the past few years use USB 2
Edible Apple backs that up by noting that only 1 out of the top 10 camcorders on Amazon supports Firewire. While that may be true, there are a bunch of camcorders on the market that still have Firewire on them that won't work with the new MacBook. Musicians are pretty fired up about Apple dropping Firewire too, complaining that Apple now charges US$700 for the port – on a MacBook Pro.
It's pretty clear that Apple dropped Firewire to differentiate its consumer from its pro hardware. If you need Firewire, buy a MBP the thinking goes. Previously the video card was the main differentiating factor between Apple notebooks (and screen size, ExpressCard slot and Firewire 800). Now it's Firewire.
No Firewire and a glossy screen? The new MacBook seems pretty lame to me.