UPDATE: She's been found! Woohoo
2003-12-8 1050pst: I've just been told that Andrea has been found. Her family sends sincere thanks to everyone who has helped pass the word around.
At this point, 63 people had linked to this message. I have no idea how many secondary links were made, but I'm confident that the number of people who saw this on line rose over a thousand. Thank you all!