Accessible tabs with CSS

Before I lose this, here's a nifty site to use CSS with accessible navigation tabs:
http://www.sitepoint.com/article/accessible-menu-tabs

And here's another - but I didn't use this technique:
http://www.alistapart.com/articles/slidingdoors/

Also, a note here that using AJAX clearly has the potential to raise accessibility concerns. For this project, since it is a learning-by-doing, I'm going to play first, fix (if necessary) later, even though perhaps usually I would try to get it right ahead of time.

• WebAIM's site about AJAX / Accessibility
• Standards, Schmandards, same topic