For Canon lens, not as much. Canon could independently calibrate Canon DSLR bodies and Canon lens to get them close enough.
For non-Canon glass, MAF could be useful. Take a look at lensrental.com. As you go through the lens available for rent, there's occational comments on the usefulness of MAF.
Owning a 40D, I much prefer the controls of the 7D over the 60D, which I see as dumbed down to make room for the 7D. However, the 60D has that nice LCD and some other things going for it.
Personally unless you can get a great deal on a 7D, I'd stick to the 60D and move on. For the times focusing because hyper critcal, do manual focus. You can buy an Ef-S focus screen designed for fast glass.
If you are really obsessing about focus accuracy, I suggest you buy a Lens Align device and see how close you get with your 60D/lens combinations. It has the quickest method of ensuring proper test setup; its the bore-sight alignment to make sure your camera is perfectly perpendicular to the target and ruler. I tried it on my 40D with all of my lens and found that it was within one to three ticks from perfect. That's close enough, especially if I'm stopping down.