The upgrade to Wordpress 2.1 went almost without a single hitch this morning…
I recommend the change to anyone running a lesser version at this time. Make certain you follow the procedures correctly (plugins, etc) and you too shall find great satisfaction in your upgrade.
Keep in mind that the latest version, requires PHP version 4.2 or greater and MySQL version 4.0 or greater! DO NOT ATTEMPT to upgrade if your server does not meet the minimum requirements.
WordPress Version 2.1 “Ella” (http://wordpress.org/development/2007/01/ella-21/), was released to the public on January 22, 2007. Version 2.1 includes extensive feature enhancements as described in the Version 2.1 Codex Article. In addition, over 500 bugs fixes were included in the release. For all upgrade paths, such as 1.5.2 to 2.1, or 2.0, 2.0.1, 2.0.2, or 2.0.3, 2.0.4, 2.0.5, 2.06, and 2.0.7 to 2.1, please see the Detailed Instructions or How to Upgrade in Five Steps.