For playing around with faces, you could try the "Ultimate Flash Face", at http://flashface.ctapt.de/
Not a perfect solution, it's apparently used for making composite drawings of Russian criminals, but at least it's free.
There's also the wonderful character creation system from The Sims 2, which lets you create faces by setting various sliders to change the size and shape of various facial features. The faces are slightly cartoonish and the animated expressions are usually ghastly, but it is in 3D, easy to play with, and reasonably realistic. (My biggest problem with it is the one-size-fits-all generic athletic bodies... too bad those can't be adjusted like the faces.)
In any event, I'd be interested in learning more about this research.
I do know that, at least for me, the standard supermodel look is not particularly attractive and, for some reason, somewhat creepy, though I can never really put my finger on why. I can only conclude that my standards of what is attractive are different from most other people, and beyond that I'm almost certain that I react to a completely different set of cues from other people - I've always thought of these cues as "even", "quiet", "competant", and "reasonable" (as in "thank goodness, I'm actually working with a reasonable girl, for a change! I'll give her two months, at the longest, before they find a way to get rid of her and replace her with some sort of worthless, stupid, incompetant, raving nut....")
I'd never thought of it this way before, but maybe it's a matter less of what someone looks or acts like, than what they DON'T look or act like, that I find attractive? (I'll try that on and give it some thought for a while, and see if it still seems to makes sense, since I need to catch up on a lot of sleep right now....)