Jeremy sent me a link to one of the Microlite 20 games. It's called the Golden Edition. And at 142 pages, it's not so micro. Haven't looked through it enough to see if it's "lite" or not.
Anyway, it reminded me that I've had the Labyrinth Lord Advanced Edition Characters pdf sitting on the hard drive unread.
I gave it a look yesterday. I was impressed. It doesn't remove all of the unnecessary cruft from AD&D (IMO, of course), but a lot that's left behind is optional. I'd play AD&D more often if it weren't for my (possibly irrational?) despising certain wonky mechanics (percentile strength, different weapon damage vs. large creatures, 1-minute combat rounds with segments, lots of fiddly little things that don't add to the fun but add to the book-keeping).
I'm pretty seriously considering switching from my homebrewed version of Mentzer to LL+AEC. Of course, there are some things from Classic and my own houserules I'd likely keep, but I may be switching.
The big decider was the notes on using AD&D style race+class along with Classic's race-as-class. Well, that and the no percentile strength/damage vs. large creatures/1 minute rounds things.