My Quick Thoughts:
Opening: Loved Marge and the bump characters - how many of us have ever wished we could do that?
Seg 1: Nice use of Kodos, and I actually found Homer amusing. The thing with the tentacles and the shower went on too long.
B-Seg 2: Not a Halloween thing, more of an AU one, but the best executed of the three segs. Assertive!Marge forever and always rocks my socks.
ASeg 3: Weakest of the three, but I found Ned wonderfully amusing.
CETA: Maurice LeMarche described a segment in TOH which got cut on his myspace blog:
Apparently, everyone at FG didn't like that so Fox forced them to cut it? Too bad - would've been funny.