Mad4MobilePhones has a cute little article on some unique vintage cellphone kits that include a rotary phone, a banana, and a Zack Morris phone. Take the Bananaphone (pictured above) for instance. This plastic, yet realistic, fruit called Banokia hooks up to a cellphone as a hands free set so you can act extremely serious whilst walking down the street with a banana held up to your ear.
The Zack Morris-inspired Brickia is pretty savvy too. Maybe if you use it enough at the mall, that chick over by the Boardwalk Fries will come up and talk to you.