Abstract Since the start of the current millennium, experience and expertise in the development,and,delivery of mobile learning,have,blossomed,and,a community ofpractice,has evolved,that is distinct,from,the established,communities,of “tethered” e-learning. This community,is currently visible mainly,through,dedi- cated international conference series, of which MLEARN is the most prestigious, rather than through any dedicated journals. So far, these forms of develop- ment,and,delivery,have,focused,on short-term small-scale pilots and,trials in the developed countries of Europe, North America, and the Pacifi c Rim, and there is a taxonomy,emerging,from,these,pilots and,trials that suggests,tacit and pragmatic conceptualisations of mobile learning. What has, however, 066897_Book.indb9 066897_Book.indb9,3/10/09 9:02:41 AM3/10/09 9:02:41 AM 10,John Traxler developed,less confi dently,within this community,is any theoretical conceptuali- sation of mobile learning,and,with it any evaluation,methodologies,specifically aligned,to the unique,attributes of mobile learning. Some advocates,of mobile learning,attempt,to define,and,conceptualize,it in terms,of devices and,tech- nologies; other,advocates,do so,in terms,of the,mobility,of learners,and,the mobility of learning, and in terms of the learners’ experience of learning with mobile,devices.