I have been hearing more and more about CSS frameworks that use grids, but I didn't really get what they were talking about until reading Jason Santa Maria article over at 24ways.org: "Making Modular Layout Systems":http://24ways.org/2008/making-modular-layout-systems. Now I have a better idea of why people are so buzzed about trying to get something like 960 Grid or BluetripCSS into Drupal 7 as a core theme (http://groups.drupal.org/node/16457)

Quick digression from Ajax. The was a thread on the developers' list about drop down menus, so I thought I would share my approach. This is an pure CSS solution (The .css is probably too site specific to be generally useful, but I included it as an example).