One thought i've been playing with is creating a category for each additional blogger.
this creates a community of several people in a single blog.
let's say Jose, Felize, and Arturo get together and begin to blog:
i need to enable their registrations to allow them to post and edit, or whatever level i want them to be.
and then create their categories:
category 1. Avisos
category 2. Jose
category 3. Felize
category 4. Arturo
Now Jose doesn't post much, so he's cool.
Felize is crazy, and she wants more categories, so cat 5,6,7,8 are each sub categories of Felize (3).
Arturo only wants one more cat, so category 9 is a sub category of (4).
Now my index is a blend of everyone's posts, and the specific categories for each user are individual blogs.
i can make links from the front page to specialized pages for each person:
Felize_index.php using the tag to only show posts in her category cat=3
and thus, style her blog any way she likes.
i can also exclude the sub categories from the main index.php (cat=1) and only show group announcements on the main index.
it will take some styling and customization, but it can be done, and it won't be a chore.
WP is the best! There are mny many others, but the support community, and group effort going on here is like no other i have ever found in a free application.
Hope my idea inspires you to stick around and grow with us.