The 3-D tag cloud at the bottom of the page is a usability disaster, but it’s kinda beautiful, and makes for an amusing/annoying challenge to actually use it to select a tag.

Move your mouse over the cloud and observe the reaction. Use your mouse scroll function to zoom in and out of the cloud. Try to click on a tag to see posts associated with that tag.

The list of popular tags is more useful, and there is always the reliable search box.