Well, some camcorders have USB connections, you can check that - or depending on when you got your mac book, you may be able to return it and get either:
2009 white mac book (has 400 firewire)
2009 Macbook pro (either 15 or 17") and an 800 to 400 firewire converter.
Unfortunately, I think it was kinda silly for apple to not have firewire on their main macbook laptops, but oh well.
You may be able to find some sort of firewire -> USB converter that might work. I know a long time ago, the breakout box for the pinnacle liquid edition pro kit was a usb2.0 unit that had firewire in/out so I know firewire to usb can be done (yes, I actually still have mine, unfortunately, it's only windows)
Good luck!