WordPress 3.1 will most likely be released in the next few weeks, and it brings with it a few major changes. If you’re a regular WordPress user, you might not immediately notice many of the updates; but if you are a WordPress Multi Site user, or you are a plugin developer, the changes will most likely seem somewhat revolutionary.
The major change for WordPress Multi Site is the isolation of the Network Administration area. The Super Admin menu is going away, and being replaced with an entirely new admin dashboard for Super Admin users. Developers that initially made their plugins compatible with WordPress MU or WordPress Multi Site will need to make some minor modifications in order to make their plugins compatible with WordPress 3.1.