Having read Mapleshade Audio's article on their website lauding maple, I still wonder if other woods aren't equally capable of serving well for shelving. I'd tend to think all tonewoods have resonant frequencies that might be more or less useful depending on how they'd react with a particular piece of gear and one's preferences. Any native tonewood guitar builders in Australia are using would be worth investigating: Australian Black Acacia, Queensland Maple and Queensland Walnut are the three that come to mind.
