I know this has been suggested before but I wonder if anyone would be able to set up a wiki.
The problem is no guide can be comprehensive due to the sheer number of edible native plants, especially in the tropics, and a lot of guides aren't arranged in a sensible manner. If a wiki was set up, with a page for each edible or useful species, each could be referenced systematically and checked. Plants could be flagged as possibly edible if they had edible close relatives and confirmed edible when a reputable published source or knowledge from indigenous people confirmed their edibility. And distribution maps could be linked to pages which gave a list of all edible plants in a particular regions. The wiki could be extended to bushfood animals, fungi, seaweeds and native medicines with each page giving uses of each species, important identification features, a few good photos perhaps uploaded from the photo gallery, nutritional value and the time of year it is available. Hopefully this could eventually replace the authoritative guides as the number one source of Australia wide bushfood information.