http://www.google.co.nz/logos/2011/houdini11-hp.jpg

http://www.google.co.nz/search?q=Harry+Houdini&ct=houdini11-hp&oi=ddle

Outside of Google.co.nz too now
  

Maybe global...

http://www.google.fi/logos/2011/houdini11-hp.jpg

http://www.magictricks.com/houdini/

There is currently a storing about a secret animation in the doodle which I don't believe because these things are normally discovered by more people.

http://www.benningtonvalepress.com/2011/03/video-game-expert-unlocks-secret.html

Next to that the story doesn't have any screenshots or other prove that there was an animation and besides that aprils fools is coming soon :-).

But, I need to ask, anyone noticed something?

Ok got an answer from Google saying: "No secret animation in the Houdini doodle"