Coolie on a road in Java, 1946 (from The Commons)
Glad to be doing this last CSS post. Like I've said before, I'm sure I'll be revisiting CSS after this, but not in an organized, step by step way. I've been through a good assortment of the basic stuff that can be done with CSS as well as a few more interesting aspects (like Sprites, coming up). There are all sorts of fancy CSS tricks, particularly with the new stuff in CSS3. Those are the kinds of things I'm looking forward to talking about in the future. For example, I read a neat post about advanced shapes you can make with CSS3 (I can't seem to find the link though).
Back in the days before everyone was on broadband, you had to be super careful to keep your pages' file sizes small. Too many images and/or too long a page and the many users on 33.6-56k modems would be forced to sit through minutes of loading for every page. The issue still exists today, but it's now more of an advanced usability, SEO and high volume website concern.