I am not getting a new MacBook figuring my late-2007 one is just fine, but if I were (and weren't going to consider the MBP), then I wouldn't let the lack of firewire influence my purchase. The only device that I currently use with firewire is my external hard drive, which can also be powered by a ton of other ways (USB, eSata, Firewire 400/800), so I would definitely be able to make it work, without. And I personally am only using it for Time Machine, so being able to get the higher speeds through FireWire wouldn't make a huge difference to me.
So, would I use it, yes, would I actually need it to use my devices, no.
And as to the poll, in the future, I wouldn't make it a "public poll" where people can see what you selected, I would just make it a regular poll. It is just my feeling about it, and I wouldn't be surprised if I am alone with this opinion. It makes viewing the results a little easier, and I think that most people (well, me at least) like anonymity when voting on something, whatever, it doesn't make a huge difference.