Spiders:
Museum of Victoria Spider Page
Australian Museum Spiders Page
Queensland Museum Spiders Page
Spiders of Australia
Arachnology

Writing and publishers:
The Victorian Writers' Centre
Allen & Unwin (publisher of The Skeptic's Guide to the Paranormal in Australia and New Zealand, and Crocodile: evolution's greatest survivor, Australia and internationally.)
Thunder's Mouth Press (publisher of The Skeptic's Guide to the Paranormal in America, an imprint of Avalon Publishing Group)
Avalon Publishing Group ( (publisher of The Skeptic's Guide to the Paranormal in America)
Lothian Books (publisher of Avenging Janie)

Magicians:
Ian Rowland - an inspirational mind reader and mind motivator.
Simon Coronel - the best close-up magician in Australia.
The Australian Society of Magicians

Mathematics, Science and associated wonders:
(a slim selection of a web full of fascinations out there)

Favourite Writers:
Martin Gardner and the invaluable Martin Gardner Index
James Gleick
Clifford A. Pickover
Rudy Rucker
Simon Singh
Ian Stewart
Cliff Stoll
Eric W. Weisstein

Chaos and Fractals:
The Spanky Fractal Database
Caren Park's Image Gallery

Skepticism:

Australia:
Australian Skeptics
Victorian Skeptics
The Mystery Investigators

International:
CSICOP and the Skeptical Inquirer (US)
James Randi Educational Foundation
The Skeptic Society and the Skeptic Magazine (US)
The Skeptic Magazine (UK)
The Skeptic's Dictionary