[gojomo]

I heard there was a printed student guide that was informally called 'the face book' at Harvard (and possibly other places) before any of these online projects got underway.

If so, I suspect the key question is whether that term can be repurposed to become a trademark for vaguely similar, but broader, commercial online services, and which actions of Zuckerberg and others may have served to create a defensible claim on that mark.