WordPress.org

Simple user admin is a WordPress MultiSite plugin that gives site administrators a simpler interface to manage blogs and users. The plugin allows you to search for users and blogs, see the blogs that a particular user has access to, and users that have access to a particular blog. You can add users to a blog, or add blogs to a user. You can also easily change roles for a user for all their blogs, or change roles for all users of a particular blog.

The plugin also makes use of the __() function to allow for easy translation.

Many thanks to Joost from http://yoast.com/ for fixing the plugin to work with MultiSite. Also thanks to Adam Dunson of http://www.cloudspace.com for lots of development work.