I went to Las Vegas for 4 days with Virgin, Los Angeles with United, then to Auckland with Air NZ. Then Sydney and Melbourne (Air NZ and Virgin Blue). We then went to Singapore and then Dubai with Singapore Airlines before coming home with Virgin. We got a Grand Escapade ticket through Flightcentre which give good flexibility with the various companies who are codeshare partners. No jetlag going this way round and you get double the luggage allowance on the planes. Singapore Airlines are superb.