Sorry I couldn't help more--my Ubuntu-fu is preeetty old in internet years, and I have no idea how things stand with drivers for the most recently released macs. It may be that you're having more trouble getting stuff to work because the unibody Macbooks are new, and have all sorts of new hardware in them, but eh, you work with what you got.

BTW, my failsafe for finding tricky things like drivers was to hunt down the name of the driver somewhere, then google for it or for the phrase it is described with straight up. If you still can't find anything, I'd come back here and edit your post to include details of what drivers you're looking for, OR post on the Apple subforum at ubuntuforums.com and see if anything turns up. With Ubuntu, you usually aren't the only one experiencing a problem; the key is finding out what has worked to fix that problem, or if (sadly) nothing has worked.