www.oneworld.com also works now. It's difficult making hyperlinks to the individual benefits pages, though, because it's done on a forms submit. Anyway, with the benefit of a bit of digging, try these.
Qantas
oneworld benefits:-
http://www.oneworld.com/satellite/ti...=1&uni_tier=55 (Platinum/Emerald)
http://www.oneworld.com/satellite/ti...=1&uni_tier=51 (Gold/Sapphire)
http://www.oneworld.com/satellite/ti...=1&uni_tier=56 (Silver/Ruby)
British Airways
oneworld benefits:-
http://www.oneworld.com/satellite/ti...d=5&uni_tier=6 (Gold/Emerald)
http://www.oneworld.com/satellite/ti...=5&uni_tier=12 (Silver/Sapphire)
http://www.oneworld.com/satellite/ti...=5&uni_tier=59 (Blue/non-tier)
http://www.oneworld.com/satellite/ti...=5&uni_tier=-1 (terms and conditions page, FWIW)
American Airlines
oneworld benefits:-
http://www.oneworld.com/satellite/ti...d=4&uni_tier=2 (Executive Platinum/Emerald)
http://www.oneworld.com/satellite/ti...=4&uni_tier=10 (Platinum/Sapphire)
http://www.oneworld.com/satellite/ti...d=4&uni_tier=9 (Gold/Ruby)
I can do more of them for other carriers, if anyone wants.