President Obama will deliver his State of the Union address to the joint houses of Congress tonight. I've been compiling a few other famous speeches for the Datablog, so we can compare keywords, that sort of thing.
I've found the most amazing resource - the American Presidency Project based at the University of California. As well as every state of the union address ever made by a president, it houses over 80,000 digitised documents relating to US presidents, all in a searchable database. Love it!