The link to the $5 microscope on amazon. Comes with 3 batteries, 2 LEDs, free Prime shipping, the Best 5 bucks you'll spend today.
The iPhone4 BodyGlove case I'm using.
And some sample pics taken with it:
Surface of a fossil crab carapace
Slide of a spider
Slide of a Flea
a random tiny insect found in my car seat
Adafruit multitool logo
Gears on the Kinekt Gear Ring