Fans of the Da Vinci Code book and those who can't wait for the movie to be out next year should check out the official website to look for hidden images, numbers and words in the site's flash introducion. In all, I found seven such clues. The flash moves very fast so use the pause, reverse and forward buttons to slowly look out for the following.
The words Find Robert Langdon on the shoulder.
To the left of the face, you'll find 1/2 (1+square root of 5) which equals to 1.61803399. 1:1.61803399 is known as the Golden Ratio.
The numbers 1 1 2 3 5 8 13 21 on the side of the body. These numbers are the Fibonacci Number Sequence.
The letters PS to the right of the girl's head. PS refers to Priory of Scion.
The words Rose Line written upside down.
A green logo known as the Fleur-de-Lis on the hair.
And lastly, the words San Greal on the table of the Last Supper. Now try playing the flash again in its actual speed and see if you can spot all of the above.
Update: Another hidden item has been found.