The iPhone Boom Mic ($40.00) It's a small microphone that gives your iPhone videos big, professional style sound. Think, your subject amplified and background noise dulled. The mic attaches to the headphone jack and adjusts to hold the back of your phone, even over a case! It's super lightweight, so you can carry it in your pocket wherever you go.
I always thought these phones were so retro-elegant. My sister had one installed to use as an intercom in her room since her model didn't have a dial. I recognize that the design is not practical because it limits one's movement while talking on the phone; however, it's still cool.