While most of us processed Barack Obama's inauguration speech by assessing our emotional or intellectual reactions, you could also evaluate the speech's place in history by taking a close look at its "word cloud." Words like "nation," "common" and "people" revealed Obama's intention to make a wide appeal, while words like "new" and "forward" look like substitutes for his campaign buzzword "change."
When comparing Bush's 2005 speech (the bottom image here) with Obama's, it's obvious that Obama didn't favor any word as much as Bush favored "freedom." Read Write Web also generated world clouds for Bill Clinton, Ronald Reagan, and Abraham Lincoln's inaugural speeches. Bill Clinton went heavy on the words "new" and "century," while "government" dominated Reagan's speech. In Lincoln's first inaugural, the most prominent word was "war."