Hi nicholi.
The page is hosted and curated by the PRI Australia, which is directed by Geoff Lawton a very close student and friend of Bill Mollison, one of the grand masters of Permaculture and even one of the "inventors". Geoff Lawton himself is one of the grand masters of Permaculture himself and dedicated his life to spreding the word and teaching about it. The site is stuffed with great articles about all Permaculture and Homesteading aspects possible and has a great Forum as well.
Its with that Geoff Lawton, that I send the entire last year in a weekly online course that completely blew my mind. If your interested keep your eves open on Geoff Lawtons webpage (http://www.geofflawtononline.com) for the announcement od the "second season" of that course. The infos and singn up should be released soon.