Someone needs to write a universal javascript plugin that would create an interstitial landing page with info and action items about SOPA. The user could then dismiss the interstitial page, and it'd roll up as a bar at the top of the site.

The javascript would be easy for site admins to add, and it would be easy to distribute.

I don't want to make this, but I'd add it to my sites if it was designed well. :)