A service where subscribers to my service can log to a central site, post blog posts(to a selected category).
Then it get queued where one of my people look at the posts to make sure they're of decent quality.
Then when we see its of quality, we approve the post and it automatically post to one of the blogs in that category, in our growing network of blogs.
We would have an ever growing network of blogs that would publish the posts that are sent to a main member website, and approved there, then automatically posted to one of the blogs on the topic of that post.
The site/web service/network of blogs would also need to be able to get other peoples blogs added to the network, and their blogs would also be able to automatically receive blog posts(and they would have the option of requiring they have to see the posts and manually approving each post, before it post on their blogs.