I build something similor about a year ago.. (The demo is in Dutch, but u can see the way it works)
http://netvibe.nl/__imagemanager/ demo demo It's part of an CMS system I developed, and is used by several customers. The CMS system is based on 'modules'.. These days i've got 7 working modules, like Guestbook, Weblog, Newsletter (double opt-in / stats) and other..
