Check out this fun Star Trek iPhone case by AndyC, the simplest mods are always the coolest.

DIY Star Trek iPhone Case

“A decade old Star Trek pin with the pin part broken off many years ago.  It’s been super glued to the back of my iPhone case (not to the iPhone)”

AndyC via Make, Crunch Gear

Here are some other cool iPhone cases worth checking out.

Paul Frank Headphones Julius iPhone Case

Paul Frank iPhone 3G Cases

Gorilla Carbon Fiber iPhone Case