Greg I noticed the bit on your site about Swamp Foxtail Grass. I think they have it planted on the approach to the new 'green' bridge in Brisbane. I'll try to get you a photo. It wouldn't look too good if they planted an invasive species there, given their promotion of it as an environmental solution.

What do you think of the idea of promoting the planting of food trees (not necessarily natives) in urban areas?

Would they be more water intensive than natives?