As I've said before with respect to fraudulent pitches like this, there were no girls in Lane's Class of 1970. And I've heard from others who have paid up for the service in response to Classmates' endless emails, only to find that no one had signed their guestbooks, and no one was looking for them. Once I'd call a mistake. But this is actually the third such pitch I've received (I mentioned the second back in January) and three's a pattern. I suspect I will get another every so often.
Simple lesson, put bluntly: Assume that everything you receive from Classmates.com is a scam.