The Barack Obama Inaugural Committee today released this Official inauguration poster. I found this from The Huffington Post. According to the article:

Designed by famed street artist Shepard Fairey, the print, created especially for the 2009 Inauguration, boldly declares “BE THE CHANGE.”

It is the next step in the branding of the presidency — a development that is not unique to Obama but one that he has used better than any other politician in recent memory.

Fairey’s initial design — a guerrilla style, dark-colored portrait of the then-candidate — proved to be a political and cultural phenomenon during the campaign. The current edition plays heavily off those themes and it seems likely to be a major symbol during the inauguration festivities.

Apparently there is also an Inaugural Collectibles online store.