Apparently she works at Walmart alongside her new husband.

Having abonded her 5 children and fled with her new husband (not the current one)n 10 years ago to avoid paying child support, she has never sent a card or letter to check on the welfare of the children she left behind.

Recently however she has contacted the youngest child, now 15, and caused a great deal of angst amongst the family she left behind, wanting her to move to the USA, without revealing where she lives of course. I presume the driver is the new daughter and her need for help in raising her (the eldest daughter she left behind having filled that role for her previously).

Anyway, a quick search for her first name and high school on facebook found her now that I was aware that she was online.
http://www.facebook.com/people/Robyn-Blackman/1766644397

Of course, everything on her page could be bunk, I have no way of knowing, but it's the first clue I have had in 10 years.

If you know her, please report her to the Child Support Enforcement authorities. Australia and the USA have mutual agreements on these matters.