There is a new security & bugfix release: WordPress 2.2.2. There are no new features in this version. Since it is a security release, all users should upgrade as soon as possible. Read the original announcement for full details. Download now!
Also, as mentioned in the original announcement, there is a new version in the 2.0 legacy branch: WordPress 2.0.11. This branch is maintained for the Debian package, and is also the only supported release which works with MySQL versions prior to 4.0.
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