Here’s an interesting article outlining the use of Apache’s mod_rewrite. In particular, it has an extensive examples section, including one covering round robin DNS based load balancing.
I found two interesting discussions today on how to handle font sizing in CSS.
The folks at the thenoodleincident.com have put together a great visual reference to how different font sizing methods compare across browsers and platforms.
A more techincal discussion of font sizing can be found at here, a Wiki dedicated to CSS.