Two excellent websites
Firstly The British Library is currently hosting an exhibition called Taking Liberties which we intend to visit soon. I've recently discovered that they are also running this excellent interactive site. I encourage you to give it a go.
Also of interest at the moment is the very interesting site from President-Elect Obama's transition team - check out Change.gov where you can subscribe to its RSS feed. What's surprised me most is that they are listening to non-Americans in several of these sub-categories including the very open American Moment and Obama CTO. As if the announcements announcements of the transition team investigation signing statements, environment issues and Gitmo wasn't enough! :-)