Why four Googles? GoogleGoogleGoogleGoogle lets you search Google x4 times on the same open tab!
The developers were chatting on Google Talk one night, and they wondered if googlegoogle.com was taken. It was, but googlegooglegooglegoogle.com was available. In a impulse buy, they purchased the domain and someone had the idea of putting four googles on the page. Thus, googlegooglegooglegoogle was born.
Try it for yourself. GoogleGoogleGoogleGoogle.com