Just wanted to pass along that WordPress 2.2.2 was released the other day. This release includes only security and minor bugfixes so they should not cause any plugin or theme compatibility issues, so you have no good excuse not to upgrade.
Click here to see the list of bugs and security upgrades that took place. One of these fixes was a CROSS SITE SCRIPTING Vulnerability. These things are popping up all over the place.
Download the latest update here