However, the access to information that's becoming possible now with the expansion of Social Networking is truly amazing. I just got hooked up with a Facebook Group (via a Yahoo Group, via some digging on Archive.org) for folks who were users of American PeopleLink (aka PLINK) back in the mid-80's (well, Plink existed from '84-'91). I even appear on the "historical" site, in the guest list for the 1986 "mega party" in New York!
As much as I've poo-pooh'ed FaceBook, I have ended up finding people from deep in my past, and from various contexts, via that. I still don't much care for it as an interface (would somebody make those stupid games/quizzes go away?), but in terms of digging up people, it's amazing.
I am somewhat staggered to think that I've been doing this on-line stuff now for a quarter century ... PLINK, CI$, AOL, IRC, LJ, and beyond!