I think I may have located a friend from college. She dropped off our radars pretty quickly after graduation. She had a ChemE degree, and the Goog only turned up one person with her name, and that person was a DBA. Not a match, I thought.
After combing through and correlating other bits of data over the last few months, I think it must be her. I sent her an email and am crossing my fingers.
After all, when I think about the twists my own career has taken it's not so hard to believe it could be her.