Article directory, capable of sharing adsense

We're looking for a simple script that has the following functions: Add users/authors Have those users add articles (through some WYSIWYG editor, but worst case HTML in a field) Each article has for example a title, (seo friendly) url thats used as: [login to view URL], short version of the article and the full article. Administrator confirms the articles and it is shown online on the website. The website has a number of categories and articles are shown within those categories. Adsense revenue is shared between the author, website owner and optional a referral that referred the user. The authors can add their adsense publisher code in their account details, the administrator can change his own adsense code and the exact percentages that go to author/referral/himself. Furthermore there should for the administrator be pages with the last 10/25/50/100 new articles with links (to be used for SEO purposes), Examples of comparable sites are: [login to view URL] (complete website) [login to view URL] (very complete website) [login to view URL] (very simple) Please let me know how you'd like to "start" with this project, what your experience is with this kind of projects, if you recommend taking an already built system and editing that to our purposes. Please let me also know what your experiences are with Adsense revenue and SEO. Our target is to start 5-10 simple sites based on this script. Design will be a bit different on all but in essence, they will run on this system. Probably we'd like to expand the basic script later in time with extra options.