Kryptos sculpter to reveal a clue on the structure's 20th anniversary.

Anybody into puzzles, sculptures, the CIA, code-breaking and/or Dan Brown's newest book might be interested in this.

source -> wired.com

The artist who created the famous Kryptos installed at CIA headquarters is unveiling a clue to help code-breakers solver the elusive 4th side. The previous 3 sides have been concurrently solved by both the human brain and a Pentium II computer, but the 4th side remains unsolved...

From the article:

The new clue is to be revealed in a New York Times article this weekend, to mark the 20th anniversary of the sculpture, which was dedicated Nov. 3, 1990.

source -> wired.com

source -> http://www.wired.com/threatlevel/2010/11/kryptos-clue/