I posted a similar comment (http://mu.wordpress.org/forums/topic.php?id=290&replies=11) to an old (dead) thread a month back, but felt that it wasn't in the best place in the forums. I am in the process of moving about 90 student blogs from individual wordpress blogs to wpmu. The administration of the blogs is obviously easier in wpmu. What I want to know is if it is possible to classify (categorize) blogs. That is can they be put into groups for bulk editing.
For example each student's blog would be in categories for each of their classes, then a new user (teacher) could be added to each student's blog by adding the new user to that group (category) of blogs without having to edit each blog separately. Another example would giving students a theme (or theme choices) based on grade or some other criteria (team, club, etc)
This could of course work well with commercial sites that want to have clients pay extra for added features, since there could be finer grained control of the features that individual blogs could pay for.
Along with this would be the ability to use the Role Manager plugin with wpmu to also give finer grain control of user rights. For younger students (and less technically confident users) it is good to give them a simpler administrator interface, and finer control of features. I don't always want my students to be have full admin rights even of their own blogs.
I am not a php programmer, but would be willing to try and write or edit something to get it to work with wpmu if given some hints of how to start. Of course if their is something already out there that would be even better.
I look forward to further discussion and thanks for any help.