After reading this thread I ordered a LensAlign MkII which finally turned up today. They posted quickly but mail from the USA to Australia seems to have been a bit slow lately. Anyway I thought I'd post my results after using it on my lenses with a 7D:
24-70mm f/2.8L, +5
50mm f/1.4, -1
70-200mm f/2.8L IS II, +2
100mm f/2.8L IS Macro, +8
So my two most used lenses the 50 and 70-200 were pretty much on the money, I've always been happy with them but it'll be interesting to see if they are just that little bit now, that may have been a small "problem I didn't know I had". The 24-70 I've mainly used for things where I didn't want too shallow DOF so it doesn't really suprise me I'd never noticed that one.
The 100mm macro was my last purchase and I hadn't been happy with autofocus, but being my first macro lens just put it down to the usual recommendations of tripod + manual focus for macro. After trying a few things like AI servo in case it was me moving too much I'd pretty much given up on handheld for anything approaching macro. After the adjustment I just wandered around the house doing a few hand-held test shots and now everything is bang on target.
Anyway that's a lens I see I'll get much more use from now, so I'm glad to have heard about the LensAlign and about focus adjustment in general which I must admit I didn't know about until I read this thread