Here's a preview of an upcoming "starter" child theme I've been working on:
I wanted to toss this in the ideas forum since it'll be a bit before it's released. It'll be a Hybrid 0.8 and WP 3.0 child theme because it relies on the new WP custom background and navigation menus features.
Yep, that's a custom uploaded background in the preview picture. You can add anything you want there from the admin.
One thing I'm still thinking of doing is adding a cool custom page or post template along with it. But, I'm out of ideas at the moment. Feel free to offer any (no feature sliders, please).