Okay, so I made a first pass at a landing page. I'm glad Steven mentioned the SOPA thing, because there's a lot of brand recognition in that image and there's a "white" version of it so I started with that.
Each link goes to a specific place with more detail. These four broad categories seem to make sense to me. Full copy for the secondary bullets needs 'ritin'.
--- Brandon Harris, Senior Designer, Wikimedia Foundation
Support Free Knowledge: http://wikimediafoundation.org/wiki/Donate