Here's what I've been through so far today:
Tried to boot with new 6.1 ISO. Locked after pretty loader boot menu. Reboot.
Tried disabling ACPI. No luck. No text at all is displayed after the menu. Reboot.
Popped in a 7 snapshot CD. The laptop actually boots past the menu this time, yay! But then it gets a message about how AP #1 (PHY# 1) has failed, and asks me if I'd like to panic. Hell no, I don't want to panic. I press n - Nothing happens. D'oh. The keyboard is handled over USB. Go figure. Reboot.
Do a little bit of poking around on teh google, and decide to disable ACPI. Laptops without ACPI are completely pointless, but so's having a laptop that can't boot FreeBSD. I boot with ACPI disabled, and it gets past the initial processor magic. Everything appears to be going fantastic, then it panics with some screwed up mutex error from sys/vm/vm_fault.c. Whatever. Reboot.
Boot up again, and forget to hit any buttons on the keyboard because I'm talking to someone on IRC on my desktop. I look down, and I've got an installer screen.
Today is just full of weird stuff. I'll update again on my progress later.

I nuked my 36GB scsi disk to setup an XP/Ubuntu dual boot not realizing I had XP on that disk. I knew there was a reason I swore off dual booting 2 years ago.
Do you know if anyone has gotten Google Earth for Linux to run on FreeBSD?
I haven't found any information about that yet. I'll ask around, but I'm betting that when someone does actually get it working, it'll be up one of the major geeknews sites.
I booted freebsd 6.1 snapshot of august on my macbook. It loaded with the acpi enabled without problems. The current 7.0 snapshot fell down in to debugger with a panic.
I don't have a spare sata disc to play with for installing the freebsd base system.
Did you use the firmware update that Boot Camp requires? ( some mistakenly call the update itself Boot Camp :P )
I did not use bootcamp. But only booted the iso cd. Which worked for me. If i had a spare sata 2.5 disc i'd be happy to try and do a full install.
Oh i forgot, i'm running the latest firmware from apple for the macbook.