hi,
yes you can get your airmiles with a RTW ticket, these tickets are generally linked with one airline group e.g. one world alliance, which covers aer lingus, ba, quantas, cathay pacific etc. you can sign up for quantas FF account and still get airmiles for aer lingus flights etc. bear in mind you need a hell of alot of points for a flight but there are usefull if you get to oz and want an internal flight. on quantas flyer points can be transferred between family members.