Honestly, I haven't intentionally touched my AA this year. There have been some ups and downs and, completely by chance, the AA hasn't changed enough to worry about (other than that the total isn't as high as I would have liked, heh, heh.)
In '10, I intentionally raised my stock portion as my AA is still well below 50%. But last year ('11) I couldn't seem to get my mind around it. Too many other things crowding out the important with the urgent. You know it's a bad year when Koolau "forgets" to make a Roth conversion - actually, I "chose" to put that decision off until this year. Yeah, that's it.
I'm starting to feel a bit more in control this year, so I'm going to take another look at the whole thing and see if there are some tweeks that need to be made.
Ko'olau's Law -
Anything which can be used can be misused. Anything which can be misused will be.