A history of GFF would definitely be a good thing. I also wouldn't mind seeing a list of in-jokes... since I've been away so long that I'll probably not get quite a few ^^; (anything since around July/August last year will probably just go straight over my head

)
In terms of nuturing newbies, I think a newbie forum survival guide would be very useful.
I know that when I was a newbie (back in the days of GFA), I was always very cautious to post because I was worried that I might be char-grilled in the aftermath
I think a general newbie survival guide would be a great start. Things such as using proper grammar where possible, avoiding SMS or AOL speak, basic ettiquette, resorting to solid arguements rather than knee-jerk lashing out (i.e. to quote Asimov, "violence is the last refuge of incompetence"

), etc etc
Also perhaps some sub-forum specific survival tips (especially for The Sewers and PP... I remember the first time I went in there I got flamed and took it personally when I shouldn't have... glad I've grown up since then

).
Another addition that could possibly useful (although one which I'm very very tentative of suggesting, because there is a possibility that it could create bad-stigma, etc) is somewhere that describes the perculiarities of some of our longer-standing and more eccentric members

(in other words, people who you shouldn't get too offended at if they give you a little bit of shit

)
Jam it back in, in the dark.