This subject concerns the parametrization of moodle so that it becomes more suitable for use via PDA devices and support more efficiently mobile learning. We cannot say that the navigation in moodle is the best when someone use his/her pda.For example, the horizontal scrolling bar would not be supposed to exist, according to guidelines of a pda application (w3c- http://www.w3.org/TR/2006/WD-mobile-bp-20060412/#bpgroupnavlinks, http://www.w3.org/TR/2006/WD-mobile-bp-20060412/#cm).
Therefore, here we can propose ways for parametrization modules of moodle so that they are friendly for use via mobile wireless divices.
Opinions and solutions would be expected
This does not sound like a trivial task. However you might like to investigate the work that is being done to open up Moodle functionality as a web service.