The American Web Page says:

Africa
Asia (including India)
Australia (NZ abd South Pacific)
Europe
N. America (incl C.America)

It omits Central and South America which makes it impossible to do 6 continents but I think this is just an error!

I'll try and get more than one with a OneWorld explorer 6 continents fare and a few extra short hops - Darwin->Bali, LHR-Marakesh, MIA-Caracas.

American don't mention a rule on the QF offer of having to stop 24 hours in each continent for it to count.

Any other suggestions appreciated.