In many well-known programs there are hidden features or messages called easter eggs, being put there by the developers for you to find. Like in some applications from Google: Docs (Cliply), Picasa (bears) and Reader (ninja and the end of internet). But it seems that these ’eggs’ are not only featured in the applications from Google but also in the special Google Doodles. Several Doodles appear to have a symbol in it which looks very much like a Triforce – this could be an easter egg or an artist’s signature, and a hidden reference to the Nintendo Classic Zelda game, where the Triforce appeared. Wikipedia explains: “The Triforce is a triangular relic which features throughout the series as a nearly-omnipotent sacred item representing the essences of the Golden Goddesses. It is made up of three smaller triangles known as the Triforce of Wisdom, Triforce of Power and Triforce of Courage.”
Google's response
Susannah was not available for other comments, and the only thing Google told me in regards to the logos was “Users can infer any one Link or another in our doodles.”
Source: http://blogoscoped.com/archive/2009-07-16-n41.html