Palm easter eggs

The Taxi Easteregg

Go to Preferences, General, Power
In the lower right corner of the screen, draw a small circle (clockwise)
A Egg appears
Now, in any application, hold the down button and draw a line from the middle of the Graffiti input area to the left side of the screen right between the applications and menu silkscreen buttons.

The Inchworm (Palm OS 3.x)

Go to Preferences, in the general category In the graffiti area, write a '#' . After about 10 seconds, the inchworm appears and inches around until you switch to an other screen