I’ve been playing around with this and found a fairly popular theme named Cutline. After installing version 1.1, I discovered that not only was it not the latest 1.x release, there is a 2.x version for WP 2.3 and higher, so I upgraded to that. It took me a while to figure out widgets and how to link my archives and about pages, but I like it.
I may look into replacing the default header images, but I like it for now.