"1) What BA fare classes are eligible/ineligible? "

All classes other than those specifically excluded in the Ts&Cs. Pretty much any paid fare is eligable

"2) Does it depend on the member's place of residence as on AA? If so, where can I find the relevant details."

Nope. The QF scheme has no residency restrictions for mileage accrual

"3) Are BA transatlantic flights eligible e.g. to S.America? "

All BA flights, wherever they go are valid, so yes, transatlantic flights are valid.


"4)Are the restricted fare classes listed on the site accurate and up to date? e.g. only T fares are restricted on Iberia though many other fare classes are similarly cheap."

yes

"I'm not looking to gain status on QF, just want somewhere to accrue miles for OW flights that aren't eligible on AA."

Well Qantas will do the trick for you.

Dave