New kid on the block, Toolbox:creations have released Officestyle_silver. It's a commercial theme costing£7.95.
The theme features twelve fully collapsible module positions which allows Officestyle_silver to be able to generate dozens of different page layout styles automatically! It also comes with six stackable inset modules!
the Fireworks source files are included and come fully layered and sliced so you can create your own variations with ease. CSS and XHTML validated.