Joan, Advance Australia Fair is definitely dodgy isn't it? Adam Hills does a great version using the words to the song but singing it to the tune of Jimmy Barnes "Working Class Man". It's become a staple every time someone gets a guitar out at a party for us!
Were you in Australia when they did the poll to choose a replacement for God Save The Queen ("The Gawsave")? Most of us wanted Waltzing Matilda but it would have cost a fortune in royalties to A.B.Paterson's beneficiaries and copyright on the most common tune was owned by an American publishing company... plus the silvertails and wowsers were a bit put off by a song about a suicidal sheep stealer. It would have won by a mile, and at least everyone knows the words!
If I had to choose I'd go with "I Am Australian". It evokes patriotic thoughts of Australia, Telstra and Qantas! :-)
Morecambe and Wise - the lost tape
North Bristol/S. Gloucs/N Somerset
Won't last a year, never mind centuries.