that's awful chuckle. when you say her account has been "taken over" i assume you mean it's now closed, am i right?.
is your address public on your myspace aaccount so everyone can see where you live chuckle?
myspace, facebook provide great opportunities for people to keep in touch with old friends but there is always a big risk that people arent who they say they are.
i sure hope you get to the bottom of your mystery.