I'm 32 and have been dealing with MPB since I was 20 or so, but more severely in the past five years. 
After work yesterday I was talking with a few coworkers and we were giving each other shi7 about our hair (or lack thereof). I said that one day I would buzz it all off, which I had thought about on and off for some time. Then it occurred to me, when will it be "one day"?
Last night I mentioned the idea to my wife (which I think was one factor that held me back before), and she said, "why not give it a try?" So, on the way home from work I bought myself some Wahls. I was coming home a bit early to watch this kids while she had "girls night", and I told her that I would be clipping tonight. Soon after she left, I put on a #2 guard and ran it up the side of my head.
"It's ok - you can get it fixed at the barber tomorrow!" I thought. No, F that. I kept running the clippers along the horseshoe, and then finally across the pate.
Ok, nice and horseshoe. Let's buzz more. Repeat the drill with the #1, then the #0, then no guard.
(My 3 1/2 year old son was watching the entire time. First he said, "that's scary" but soon it was "I'm not scared. Don't cut me." Later he said it was "pretty" and he kept running his hands over it saying "wow" or "it hurts".)
Now I am on a no-guard cut of 1.5 mm. I called the wife and told her that our baby was asleep, our boy was playing with me, and I was a maru-bouzu (my wife's Japanese, which we speak at home. Maru-bouzu is a term for a very short buzz all around the head like a Buddhist monk has.)
With the no-guard cut, the horseshoe is less pronounced but still there. I will probably attack it with my 1951 Gilette Super Speed tomorrow (or have my barber do it - they do shaves), but I wanted to let the wife see the maru-bouzu beforehead.
No "after" pics right now, but here is me as of May 2008.  Not that bad (I'd like to think), but I was well on my way.

Will post after pics this weekend.