I have made modest modifications to Atahulapa for my Watching YouTube blog. The blog is primarily new/resaerch items, targeting researchers.
My design goals are ease of navigation, clean look, minimal clutter. Pages have consistent look and feel.
Recently removed one sidebar (left) to reduce visual clutter and added Dig Dig Facebook and Twitter icons to increase sharing of items.
Nothing sexy or clever about my design -- I have made no CSS alterations.