For my redesign notes, I wrote a new additional stylesheet. It plays with some fancy fonts, asking for Big Caslon (standard in OS X, nice, as Wallpaper uses a variant of Caslon) or Baskerville (standard in Windows, I think?), and in the body text: New York, which used to ship with OS 9. Of course they all degrade to Times.
I also wanted the first paragraph to be red. No trouble with Tinderbox.
I just opened my prototype for the blog posts, opened HTML view, clicked Paragraph, and changed first paragraph to <p class="first">.
Voila, every post got the new class. Might come in handy later, too.