The 2.9.1 version of WordPress MU is now available for download:
WordPress MU version 2.9.1 has just been released.
This is probably the last release before it is merged into WordPress 3.0 as the merge has already started!
Anyway this release brings the new features and bug fixes of WordPress 2.9 and 2.9.1 into WordPress MU. My favourite new feature has to be the Trash can, but there’s also an image editor, plugins can be bulk updated and video embeds are easier to do.
If you have more than a few dozen blogs, be sure to add the commentmeta table first before upgrade.