Moderate comments for multiple blogs on one screen no fancy screen, just what you're acusomted to.
Partition your blog into several sub-blogs using categories. This allows for supplying a unified blog in addition to "specialized" sub-blogs.
This plugin allows you to have multiple blogs running off one WordPress install which can share content, have different titles, descriptions and theme
Multiply is a plugin for WordPress 1.5.x which allows multiple blogs from within the one administration interface. Includes one-click creation of new