Nice work man! Did you sculpt the skull in Zbrush? Could you show some shots of your base meshes before sculpting, they'd be really informative to see how much sculpting went into this :D
Also, I was taking a look at the Eat3D! Old Pillar DVD and the guy just throws the sculpt into PolyCruncher for the low poly. Isn't that highly unoptimized or is it actually acceptable?
I think I'm finished with the pedestal BUT I have no idea how to retopo it. Any ideas? Can the basemesh I used for sculpting (second picture) be of any use?