Brief background:

My boyfriend's exwife has done the following things:
1. Posted very untrue and hurtful things about him on Myspace blog (public view)
2. Continues to update her status about him, and how he is "worthless, an illegal alien, etc."
3. Stated online on her BabyBoard Forum that she sent a letter to his place of work in January stating he is illegal and he is a liar. Confirmed-our Main Headquarters received the letter, called my boyfriend, and basically told him not to worry about it, that it didn't hold any merit to them. They know he is a legal citizen and are not worried about the nasty letter she sent them.

Can anything be done about this? I know we could possibly do a Cease and Desist letter, but she pretty much admitted to sending that letter (was received anonymous).