Google once did an entire week of "strips" with Dilbert inside their logo.
Google changes their logo everytime a bear shits. They've changed their logo for every holiday, sporting event, or semi-important news event for the past few years.
__________________ Bobo Adobo is funnier and smarter than all of you, proven by the fact that he is currently in a high-paying and important government job where he earns a fat cash paycheck and much pussy. How did he get so famous and successful you ask? It's simple: he has never, in his entire life, watched one second of anime.
- Outerspacekid