IDIC Blogs

We would like to create a simple blogging software like WP but not so complicated, we would also like for it to be downloadable for each user allowing them to run there own community blogging software, that allows users to join and create blogs within there community of blogs. In essence It's a massive shared blogging system that will allow people to create there own shared blogging systems, it will be great for traffic Ect.. as each person hosting there community will basically have a networked blogs affect going on but because each user is apart of the site already it forces the traffic to other blog posts with very little effort.