This is probably a tent spider (as close as I can tell from the Qld Museum spider website). We've got quite a colony of these in one of the plants in the backyard. This is a medium sized one. They are very pretty, coloured, stripey spiders.
A disembodied voice blares into the emptiness; "A new life awaits you in the off-world colonies" - a floating billboard overhead the suburban streetscapes of Brisbane, Australia.