So in my mates case i'm guessing , come from australia , get 60 day stamp. Visit IO office , get 30 day extension , have a weekend inLaos , cambodia or w/e , get another 60 days. Altogether 150 days ( circa 5 months ) ...go back to oz for short time , come back and do it again. So in the space of 11 months , get 10 here , legally. Seems to pale all the other visa options in to insignificance. ???