[bromanchik]

Have you tried facebook or myspace? She is 18 now so you can contact her directly.

Realize, however, 18 is not a magic age. If she doesn't know, you may be turning her world upside down. As far as stage of life she has hopefully just graduated high school, will be going to college in the fall and is just starting to be independant. (Although, if her adoptive parents are paying for college this process can take much longer.) Some can handle contact at this point, for others the loyalty to a-parents wins out.

I am truly sorry you were betrayed by her adoptive parents. They had to know the truth was going to come out sooner or later. Denial, however, can be a powerful thing.