A while ago I started messing around with trying to get a single WordPress installation to host multiple blogs. If you read that and think WordPress MU, you're not far off. What I don't like about WordPress MU though is that the system administrator chooses the themes and the plugins that are available to the end user -- ideally, I would want each user to control that themselves, such that it basically has the same functionality as a normal WordPress installation. There are a lot of other reasons why you might want a single WordPress install for multiple blogs. First, if you make backups of each ...