The survivor pack is complete, If you would like the new survivor skins, the pack is available here:
http://wantbrains.com/?p=12
There is no registration required, although I should warn you, The pack is roughly 140mb.
Enjoy!
UPDATE [2/26]:
Louis is complete. Looks more realistic, gave him hair and darkened facial hair, hires detail added, name tag on shirt, custom bumpmaps.
Bill is complete. Made him look a bit younger. More detail in jacket and undershirt, hat has updated Vietnam patch, Jacket tint changed, custom bumpmaps.
Zoey is complete. New checkered belt, looks more like a current gen scene chick, hair darkened, clothing shaded better, hires detail added, custom bumpmaps. __________________________
So, after Left 4 Dead came out I basically said, "Wtf." They turned the gritty looking player models into a bunch of cleaned up cartoon style fags.
I didn't like this. This made me angry, Left 4 Dead was supposed to look realistic, Not cartoon-ish.
I will be bringing you the Realistic Characters Skin Pack. High res textures, and better looking faces/clothes.
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Louis:
My first character I will be working on is Louis, because he's the best character. He loves peels.
For Louis I looked at two well known actors. Will Smith and Denzel Washington.


Click the following for high res 1280x1024:

A new bumpmap was created to give Louis' face more depth.

(Grain is due to film grain being enabled in the game.)
Transformation: Valve --> My Skin

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Bill:
Next I did Bill.
For Bill I looked at Sean Connery:

I then detailed Bill's face, darkened his hair, and beard, and overall gave it more depth.
Click for High Res:


Transformation: Valve --> My Skin

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Zoey:
For Zoey I looked at Katy Perry and Hayley Williams:


I detailed her face, then added smudged up eyeliner, darkened her hair, overall gave it more depth. She also has a new belt, and rips in her jeans.
Click for High Res:


Transformation: Valve --> My Skin
Will post soon.
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I will be doing zombies as well.
I'm not sure when this will be released, hopefully when the SDK comes out it will be easier to install skins. So probably around that time I will release it.