This is an unofficial clone of the Moodle Mobile app for iPhone that works on Android and Blackberry devices. It should work also on iPhone and iPad.
Please note that this app is not a replacement or improvement of the official app for iPhone (and Android when available). It has beend designed to be easily customizable and extendable using web technologies by anyone.
Plugin entry: http://moodle.org/plugins/view.php?id=175 (May not work, the plugin is waiting for approval)
Related post: http://moodle.org/mod/forum/discuss.php?d=191144