This application creates off-line atlases of raster maps for various cell phone apps on Android, iPhone and WindowsCE as well as GPS devices (Garmin, Magellan and others): http://sourceforge.net/projects/mobac/
The Tasmanian forum has a start with 'LISTmap and Android' here: http://bushwalk.com/forum/viewtopic.php?f=3&t=17091#p228047. It explains how to use the Tasmanian data. How do we load the data for the other states and the Geoscience Australia Web Map Service data eg http://www.ga.gov.au/geows/?