I have a 1GB&#x2F;month mobile plan, which is actually medium-large in Australia. I would burn through that pretty quick if I was streaming mp3s all day. Also we are a large, sparse country with poor (or zero) mobile reception outside cities and large towns (at all, let along 3g&#x2F;4g), and I do a lot of country driving. I rarely listen to music in front of a computer, where streaming would make a lot more sense for me.