Anyone interested in developing widgets for WordPress should take a look at Jesse Altman’s WordPress 2.8 widget API tutorial.
Version 1.1 of the Most Popular Tags WordPress plugin has now been released. This point release adds support for absolute font units such as millimeters, centimeters, inches and picas. I’ve also updated the wording used in the plugin to be more descriptive.
The latest version of the plugin can be downloaded from the WordPress Plugin Directory (or, if you have an older version already installed on your blog, you can simply use the plugin update function from inside your WordPress install).