I have no idea why you guys are so upset. Why not just get the MBP if you need Firewire?
I use Firewire on my last-gen Blackbook for TimeMachine, but it's hardly a deal-breaker for the new Macbook. After all, most ext. drives (like my Maxtor 500GB) are USB 2.0 and FireWire, so it makes little difference to me which one I use.
As far as Target Disk mode, it's pretty much obsolete since you can quite easily take the drive out of the computer. Personally, I'd rather swap data over Gigabit speed than 400Mbps over FireWire; moreover, you can use Migration Assistant over WiFi or Gigabit...
http://support.apple.com/kb/HT2288 << This is for the MBA, but should be the same for MB and MBP
For DV cameras, I hate to burst your bubble but most of the consumer cams (esp. Canon) are going to SSD and utilize USB 2.0. I like Firewire, but you're not going to use a $4000 Canon XH A1 w/ anything but a Macbook Pro.
My guess is Apple did the research, and found that less than 20% (speculating) of the people who bought Macbooks used Firewire; therefore, they took the $$$ they saved from taking out Firewire and put it towards something that the other 80% would in fact notice and make use of (GPU, DisplayPort, DDR3, etc.).
I am the only person I know that still uses FireWire, most everyone I know buys USB drives and peripherals. I've got another 3-4 years before I buy another portable, and USB 3.0 will probably be all the rage.