Yes, another advocate of CSS Zen Garden. Its the best available example to display the power of stylesheets.

Here is my site: http://www.bradjasper.com/

As you can see, even though the header is presented first the the stories are all first in the source. This touches on my SEO point earlier.

Show me YOUR site, and how it can be completely changed with just a flick of the CSS switch and I'll be impressed.

Let's switch the sidebar from the right to the left.

#inner { float: left }

#sidebar { float: right }

Granted that's not completely changed, but its enough of a change to show the effect I'm going for.