A Web forum where cryptographers collaborate on the puzzle went from attracting about 50 hits a day to thousands of hits a day, according to its moderator Elonka Dunin.

MemeStreams has been getting a noticable number of referrals from elonka.com.

Sanborn did let CNN have a look at his little-known sister sculpture on the grounds of the Hirshhorn Gallery in Washington D.C. That artwork, titled "Antipodes," contains the same text, although it lacks some of the physical clues scattered on the CIA grounds.

Anyone ever gone to the Hishhorn Gallery?

Elonka on CNN.com!!!