I still like the idea of a very subtle shadow at the bottom right, and I like the idea of the panels/columns distinguished by body color, not border color.
So, I doodle.
And I learn once again, why I tend to make the back-ends and engines, and leave the UI up to people who can do it.
The blog redesign is not terrible, just not better enough to warrant doing it. Maybe I'll think of something eventually. (And I'm open to suggestions.)