Notice the logos appearing on your Google homepage around major events or holidays? This is known as the Google Doodle. The first one was dedicated to the Burning Man festival in 1998. You can check out past Google doodles at google.com/logos.
"I'm Feeling Lucky" Button Fact
The infamous "I'm Feeling Lucky" is nearly never used. However, in trials it was found that removing it would somehow reduce the Google experience. Users wanted it to be kept. It was like a comfort button.
More Computer Facts
Hotwired was the first Web site to feature a banner ad.
The blue coloured links on a web page is just a browser default because way back on the days when monitors only had 16 colours, blue was the darkest colour that did not affect text legibility.