If you know the state she resides in you may be able to find a marriage license, which could help you pinpoint her location. Your State Government website will list all mariage license filed. You could also search by her previous last name on whitepages or yellowpages.com and see if they have a change of last name for her.
If you know where she's from, you can search her maiden name on Classmates.com if she's a member. Then it will come up with her maiden name and her married name and you can go to www.zabasearch.com with her married name for any other information you need.