I think Millie it depends on where you are in Oz to how long the wait is for DS. I asked at the clinic here in the ACt and they said they had no issues with waiting lists, but others have had to wait.

It would also depend on your age. Also there is a 3 mth "cooling off/waiting" period from the time you make the decision to use DS and the time you get it - if you know the donor then it is 6mths as there are plenty of tests for them to undergo first.

US DS will cost more - again depends on your budget and what your thoughts are on the whole thing.

Regarding the telling of your children, there are support groups around for both children and parents who used Donor sperm/eggs et al and they would probably (i guess) be the best places to go and talk with someone who has been in your shoes before.... that is where I will be dragging DH along to, so we can talk with those who have gone before us on this journey as well as these forums, which have provided a wealth of information to us (and provided us with some very useful questions to ask the FS when we meet them).