Alright peeps... I requested a Sim version of the Joker from
The Dark Knight but had no luck with responses, so finally I thought 'what the heck?', I'll just give it a shot myself. I was kind of reluctant at first, because I've never really made clothing or make up before, and wasn't sure I could even pull it off... well, I ended up being happy enough with the results to share, so here he is.

The clothing is -not- perfect (the left pant leg is funky - if anyone wants to fix that, be my guest), but for my first time making clothing, I thought it turned out ok. There were a couple of clothes meshes from other creators that I was looking at, but none had the coat long enough, so I just went with the Maxis mesh. But it was making the mask that was the real tricky part. I used the Maxis mime mask as a base and kind of did a cut and paste job with whatever full face pictures of the Joker I could find, and then smoothed everything out. It's not perfect either, but it's the best I could do... The mask is removable make-up, of course.
Which leads me to the Joker's skintone, which I thought would be neat to modify... When you remove the mask, he looks like this:
I used the Pale Louis skintone and simply added the scars to both cheeks, made the teeth more yellow, and gave him dark circles under his eyes, using that one photo of the Joker sans makeup from the film as a guide. I did attempt to make him look like Heath as best I could.
Full Custom Content:Eyebrows: Go Go Glamour Girl
Eyes: "Not So Soft" by crayonsun
Hair Mesh:
http://www.insimenator.org/showthread.php?t=4030">beosboxboy & Marvine (Note: that link is no longer valid, however the mesh IS included in this download.)
Hair Recolor: Me
Clothing Mesh: Maxis
Clothing Recolor: Me
Skintone: Me / Modified version of Pale by
http://louis.new21.net/">Louis
Face Mask: Me
*To be safe, please install this sim using the
http://sims2pack.modthesims2.com/">Sims2Pack Clean Installer!
And just for laughs...

(For those wondering, that is
http://forums.modthesims2.com/showthread.php?t=133271">MikeydeeBee's Batman, which I recommend.)

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UPDATE 8/15/08: You can now download Joker's infamous nurse uniform
http://www.modthesims2.com/showthread.php?t=297262">HERE at ModtheSims2. Enjoy!


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UPDATE 10/12/08: Get some Batman boxers for your Joker
http://www.insimenator.org/showthread.php?t=96592">HERE.


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*Note: I have the following expansions in my game: University, Nightlife, Open For Business, Pets, and Seasons. If you are missing any of those expansion packs, I recommend installing my Sims with
http://sims2pack.modthesims2.com/">Sims2Pack Clean Installer.
...Any issues, please post. If I did something wrong, set me right. Feedback is appreciated. 
Thank you, Heath, for giving us such a stellar performance.