Only Google could get away with changing their logo as much as they do, Google has to be the only place where you can go, get a funny image and you know exactly where you are all the time.
I have to give it to Googles logo designers they come up with some beauties and never fail to amaze me.
I particularrly like todays logo celebrating Sesame Streets 40th birthday.

Here is a collection of some of the Google logos.

You can check out all of the Google logos past and present at the following link:
http://www.google.com/logos/index.html
Check them out, there really are come good ones.