If you have multiple WordPress installations using the same database, this plugin makes it possible for one installation to run off the user table of another installation. Main user table selection is completely configurable through the options panel, and permissions of the users can be different from blog to blog.

See the WordPress Plugin Directory for details and a download link.

Release history

Version 1.1: fixes a problem where options could not be updated in WordPress 2.5.x and 2.6.x.