A new interface for I've been unhappy with the current "daydream" theme for a while, since it was too spartan although highly configurable.

This one, at least in photoshop, uses some new elements I'm not used to. Fixed height, perhaps even fixed length. The main menu isn't a focus, although the breadcrumb trail is. The main text area will also have to be a scrolling div, although not pictured in the mockup directly.