Wordpress Plugin Wanted

I'd like a plugin for Wordpress written that works in a similar way to this one: [login to view URL] Stage 1: I'd like to get the plugin functional. Stage 2: I'd like it to have 3 versions (set/detected from the main plugin screen): Single site Many sites, same owner (probably all just standalone Wordpress sites, not multi-user) Developer - any site (my guess is this will actually be identical to the second option as I doubt there's an easy way to tell) We'd set the milestones at the first stage and the second stage. Please include links to any Wordpress plugins you've already developed and an indication of the likely timescale. The plugin would need a basic settings screen and I guess would work with a shortcode as described on the page above.