Here's a link to the actual play reports for my current Apocalypse World campaign, set in post-alien-invasion Chicago.  It's been a blast so far!

http://infinitemachine.wordpress.com/tag/xenoformed-chicago/

I don't think any of the playbooks need to be left out.  I'm playing an AW game with my coworkers, none of whom had ever played an RPG before, and I threw in all the core playbooks, plus all the LE playbooks save the Marmot and Quarantine (for reasons of personal taste and not accessibility), and tossed in the Ruin Runner, Feral Kid, Grotesque, and Juggernaut to boot.  A few facebook posts in our group before the game introduced everyone to their choices, and no one seemed too overwhelmed come game day.

Other than that, I'd say to stress the part about "play your characters as if they were real people".  When one of my players was looking overwhelmed staring at the basic moves sheet and wondering which moves he could make, I told him not to worry about it in terms of moves, but to think of what his character would do, and I'd tell him when something he did counted as a move.  That seems to have worked for the first session; I expect as people get more familiar with the game and how it's played, they'll start getting into using the moves from a mechanical viewpoint as well.

Thanks Vincent!

That's true, there is the move just above about "when you declare retroactively...". After I posted I went through the playbooks and found the other "roll+Hx" moves, too:

-In the optional Extended Combat moves, you roll+Hx when following up on someone else's move.
-The Battlebabe's "Ice Cold" move allows rolling+Hx instead of +Hard when going aggro.
-The Operator's "Easy to Trust" move allows rolling+Hx instead of +Hot for seducing and manipulating.

And the LE playbooks give us one more:

-The Maestro'D rolls Hx for "Just Give Me A Motive", allowing them to poison someone's food or drink.

I expect an AW game with Hx for NPCs would probably need a couple more custom moves; possibly one that allows for Interfering/Aiding NPCS somehow?  (Although that gets muddy; the PC version is nice and clear that the only time you're interfering is if someone is rolling dice.  An NPC version would need to be careful not to overshadow the other basic moves.)

Of course, the book does say just after that adding NPC History is moving toward something that isn't fully Apocalypse World any more, so maybe that implies a bevy of other Hx based moves that aren't present given AW's structure and scope.   

I bring this up because in the game that I'm playing there are only 2 PCs, and they both kind of do their own thing and we have some sessions where they're in two different places and don't really interact directly much, and come end of session we don't really feel they've gained any insight into each other.  Plus, giving out a token +1Hx to each other every time gets old.  So, I was looking at giving NPCs Hx as a way to keep the stat relevant in our game.

Does anyone know of attempts to integrate this?  Any tips?

In my pseudo-medieval fantasy game, the apocalypse has not yet occurred, but is clearly on its way.  Thinking about handling omens, portents, and the future cataclysms and disasters led to this custom threat type.  I'd love to hear any thoughts anyone has on it, as well as any suggestions for additions to the entries.  ALSO: I'd love to hear other people's custom/hacked threat lists!

FATE - A Fate threat is an extra-natural force, a current of events that lead toward a predetermined end.
Prophecy (impulse: to shape reality, to dictate future events)
Apocalypse (impulse: to destroy everything, to bring about the end)
The gods (impulse: to experiment and toy, to challenge)
Nature (impulse: to restore its own order, to punish hubris)

Moves for Fate Threats:
Announce its presence through dreams, omens, signs and symbols
Return someone's own words or actions to them, amplified greatly
Make someone choose between two impossible courses
Accelerate toward its goal with silence, stillness, unease and mounting dread
Accelerate toward its goal with violence, depravity, anarchy and chaos
Attack with hurricanes, earthquakes, blizzards, famines, or other extreme weather conditions
Attack with animals, vegetation, or diseases
Attack in waves, with increasing force
Establish a new cult or religion, or choose lone spokesperson
Present hope for escape, freedom, or redemption
Deny hope for escape, freedom, or redemption
Bring final goal into being

[EDIT] Oh dear.  I suspect this should probably go in Hacks instead, shouldn't it?

Full size at: http://i68.photobucket.com/albums/i6/vitkyre/AWANRMapwithHexes.jpg

So far the caravan has been traveling back and forth between the towns between Marlboro City and Junk Haven.

The Children's Crusade - Like Reavers from Firefly, only they're all under the age of twelve, roaming through the desert, swarms of them attacking lone travelers or even caravans.  Is this a disease that only affects children?  Some sort of mutation?  Are they being controlled by someone?  Or are they simply what happens when children, abandoned and alone in the wilderness, clearly hear the call of the psychic maelstrom?