Agreed, an iPod Touch with a shitload of of storage for music would be a good thing. According to Anandtech, Apple use particularly fast flash memory in iPhones to reduce the loading time of apps - but a music-based device would be just fine with slower memory... just give us more of it (unlikely given Apple's focus on their new music streaming service)
>Has it got especially better battery life?
Most dedicated MP3 players have very good battery life.
>Is it suitable for small children you don't want to give a phone to?
Well, the sprogs can't call Thailand on it, delete your phone book or look at your naughty pictures. Beyond that, it was Microsoft who first implemented the obvious idea of a 'Kid's Mode' on a mobile OS.
>Now which pocket did I put my earbuds for my Sony Z1?
Can't help you. Are you talking about propriety Sony models with the stereo mics that use the Z-series phone's DSP for noise cancelling duties?
(Whooah, I've just given credit to Apple, MS and an Android vendor. Cool cool cool. )