Use your iPhone to count down to the first big historical event of the year — President-elect Barack Obama's inauguration. The free
2009 Presidential Inauguration Guide has a countdown to January 20, as well as a guide to Washington D.C., if you're lucky enough to be in town that day.

Wherever you are, the app's screen tells you how far you are from the steps of the inauguration — and the country's new prez.