I'll leave the surveys of the television and the blogosphere to those that are bigger and better at it to begin with and do the 9/11 themed comic strips. It's more my niche anyway, as if that weren't already glaringly obvious. I'll add to the list as I come across more, email me if you find one I've missed. I've always thought that reading the comic strips is a highly subjective experience; I've no other way to explain the continued existence of Cathy. So if I've dumped on one of your favorites, my apologies.

BTW, the dumbasses at King Features have no way to bookmark a single date for an individual strip, so they don't make the list. Out of those, I know that Dennis the Menace and The Family Circus ran 9/11 themed strips. They were about as bad as you would expect. It's too bad I can't link to Rhymes With Orange or Mutts, though.

Kevin & Kell - Nicely done
User Friendly - Too sappy
Over The Hedge - Get back to the jokes
Jerk City - Do what you do best, or the terrorists win
The Boondocks - You tell 'em Grandpa
Preteena - Never heard of this strip, but that was kind of humorous
Gasoline Alley - When you can't think of anything, you can always try yanking on the heartstrings
Dick Tracy - When you can't think of anything, there's always the tiny little note of condolence. To be fair, the note is more or less what I expect to see in a serial comic
Annie - Note and heartstrings done unexpectedly well.
The Big Picture - I don't know the strip, but this doesn't feel well done
Pluggers - Filler
Grand Avenue - Filler
Real Life Adventures - Above average filler
Overboard - What to do when there's nothing to say
The Born Loser - Barely more than filler. The Born Loser is one of those strips that once your eye catches it, you read it, but you always wish you hadn't. It feels like a waste of time.
Rudy Park - That would be a nice tradition
Sheldon - Touching
Warped - Filler
Luann- Cleverly done, if you follow the strip.
Nancy - Possibly the worst filler yet.
Alley Oop - Typical serial comic note to the reader
The U.S. of Play - If it wasn't 9/11, you wouldn't know it was about 9/11. I think that makes it decent filler.
Raising Duncan - Meh.
Committed - I think he thinks I should be doing something else.
Trevor - Clever Trevor
Pearls before Swine - Decent tug on the heartstrings
Planet Earth and Other Tourist Traps - I know the feeling
Mudpie - Competing with B.C. for the lucrative Christian non-funny funnies market
Superosity - That's a lot of words for four little panels
Ozzy and Millie - Another meme pastiche, anti-war lyrics meet skyline meet couple watching sunset. It's a big canvas brain dump.
Everything Jake - I bet he had to go buy a new pencil
The Surburban Jungle - Filler
LookWhatIBroughtHome - Sticking with what they know best
Life's so Rad - Blurry Filler
Boxjam's Doodle - Good on you, Boxjam.
Fat Jesus Weird, but it made me laugh.
Mallard Fillmore - Aflac
Foxtrot - Blended in almost too well. I totally missed it the first time I saw it. Thanks, Oreta!.