Six Apart just made designing a blog layout so easy that even a dummy like me can do it. On its TypePad service, it added a few more themes to bring the total up to: “100 themes, over 1000 professional designs, and an infinite number of customization possibilities.”

You can try it out here on TypePad’s new Design Assistant, which recently made its debut on Six Apart’s Movable Type. Pick a theme like “Camo Khaki.” Choose a Layout. Add your own custom CSS code if you don’t like the options TypePad gives you. And see how it will look on your blog. This beats the back-and-forth of having to pick out a theme and layout, apply it to your blog, see how it looks, and then go back to tweak.

Bringing Web design to the masses is something TypePad does particularly well. WordPress has its own pretty templates too, of course. But blogs on Blogger seem to have the least variation. Which blogging service does the best job of making Web design both drop-dead simple and drop-dead gorgeous?