Remember my ideal portable audio device? Well, I think I'd like to add a couple of extra features that would make this the perfect thing to carry around:

• PalmOS powered PDA
• Mobile phone (doesn't have to be 3G or anything)
• Clam shell/flip design^*

^*The audio device controls could be on the outside, so you didn't need to open it to listen to music/radio, allowing it to be carried in the pocket. The lid would operate as you would expect for the phone functionality - opening it would answer an incoming call, closing it would end a call - plus it would give access to the PalmOS interface through which all the device's functionality could be controlled.