I was happy to learn this site is now added to WordPress.com User Showcase, opened just a few days ago (announcement blog post).
To check out the details of my blog’s customization info, you can go directly to this theme details page.
As shown there, I’m currently using free Chunk theme with Custom Design upgrade with FacitWeb Typekit font. My custom CSS is minimal – mostly for margin tweaks and some color changes.
There are many other creative customization examples on the showcase, all of them hosted on WordPress.com. “Customize your blog, be inspired!”