i converted a french fry telephone into a carrying case for my video ipod. i had no good reason to, the idea just popped into my head when i was walking about with my ridiculously inconvenient hamburger phone. why not carry an oversized plastic french fry replica to match the equally absurd plastic hamburger. the build out was the same as the hamburger: gut the phone, cut some openings, fit the gadget, and then screw it back together. it actually works great (the case shields the sun, it has it's own usb cable ready to go), it just doesn't fit in my pocket anymore.
Step 1: Get a french fry phone
i bought mine through ebay. couple bucks here, couple days shipping there, and then you are back in the 80's.