'Google Books' (as a verb) the government. Set as a goal before the next census to have scanned every unclassified document the government has ever printed, drafted, or otherwise produced. I would say the same of the Library of Congress--make sure that every item that has passed out of copyright is scanned and made available free online. And be creative with your indexing: I can imagine some fascinating opportunities to employ a bunch of 19th and 20th century historians to better annotate this database, and CS folks to break down the barrier between the archive and the Main Street library.
Idea No. 29