Is there an easy way to combine multiple blogs posts into a single, daily RSS item? [more inside]
Are there any tools for posting to multiple WordPress blogs without having to go to each site's control panel? [more inside]
What's my best option for a multiple-user blog? [more inside]
Is there any good solution for multi-url blog software? I've got a bunch of domains, and I want to run different blogs on each of them, but I don't want to have to install, say, a separate copy of Wordpress for each of them (and then have to go update all of them individually when there's an update). They're all located on the same physical server (linux/Apache).
I'm looking for a weblogging system for an academic course. Unfortunately, MT and Blogger don't seem to meet my needs: it has to have multiple users, user groups, and posts need to have access control (certain posts can only be read by certain groups). LiveJournal offers this, but I don't want to have to set up an entire LJ server. Is there some kind of middle ground?