Anyway, I had a short go of this now and I have to say that the shear quantity of art and the atmosphere given by it is frankly incredible.
You're not the only one either. It seems the guys over at 2KBoston have posted an artbook titled "Breaking the Mold". It's a free download. 2 different PDFs are available (15mb OR 75mb). I've just downloaded the 75mb version and it's amazing. Get it here...
http://www.2kgames.com/cultofrapture/
P.S. Beware that the Ken Levine foreword has spoilers in it.
Tommy McClain