On the android website:
Just a fyi, when your on the android website, there's hidden easter eggs.
click the android mascot at the bottom of any page, he does awesome stuff
on the home page you play a game with him
On the OS:
Ice cream sandwich has a terrible meme easter egg inside it
Honeycomb has this easter egg
Repeatedly tap on the version number in Settings -> About, and the Android mascot will take over your screen in the form of an electric blue honeybee, and make that noise in a word bubble.
Gingerbread people have this easter egg
once again, tap the version number to death. you get this wonderful picture.