You definitely need to check out the Cosmetics Cop site (see link in original post). The author of the site comes out with a new version of her book "Don't Go to the Cosmetics Counter Without Me" every couple of years with reviews of the latest cosmetics and cosmetic ingredients. It's less technical and geared more towards consumers, but you may still find some interesting info.

My one opinion in favor of the pricier lines is that I find they DO tend to be more concentrated, so they last longer - I admit bias, but this is especially true of MAC (http://www.maccosmetics.com) - they don't skimp on the pigment so the color in the tube is what goes on your face so you're not re-applying your [insert makeup here] 3 times a day. </fangirl>

I will definitely check out lemelenge.com when I have a few moments to spend with it.