We have done a fair amount of customization to our blog towards what we hope is a improved model for team blogging that facilitates better focus on authors and topics. It is a cross between a team blog (multiple authors on the same blog) and a Multi User blog (each author having their own blog, i.e. MU WordPress),
I have reworked the customizations into a single plugin we call the Blog Matrix (mainly because it sounds cool). I think the Matrix plugin would be useful for anybody that wants multiple authors on the same blog, or way to get some MU WordPress-like functions without the complexities of the MU installation.
I have written a post explaining how the Matrix works.
I read your intro – excellent stuff. I would be very interested in this plugin. My writing website will have multiple authors submitting multiple content, and what you’re offering would be ideal. Please let me know when you have it up and running for public use.