Aside from quality headphones and maybe a protective case with a belt clip, what "accessories" do you need?
I got several accessories for my iPod Photo. A Griffin iFM remote that allows me to listen to live FM, and record FM music directly to the iPod, also acts as a conference recorder with it's microphone. I wish Apple built this into an iPod, it's a great accessory to have. Another is a Logic3 i-Station compact portable speaker setup. Sometimes I don't want to wear earphones when I'm away from the computer, and it also has USB and Firewire cables and a dock for syncing the iPod to my PC.
I have the fm transmitter for using it through my truck stereo, an arm band for jogging and the Bose Sound dock. And since when does "need" have anything to do with what people get? No matter how many extras people get, the fact that there are tons of things out there to get is something people will look at when buying.