If you mean the ezBoard forums, there are countless posts listed as Unknown (or "This post has been deleted and cannot be retrieved" or whatever it says) - that was caused by a crash of the forums and a subsequent failure on the host's side to have reliable backups, and it affected much more than
TLG. Those forums are the old ones, by the way, so if you're still going to them, you're missing out on, well, everything.
As to PPPs version, it is updated, and, I believe not
d20 statted (I think it uses the generic stuff.) There is also a little more material in it, from what was discussed on the PPP forums (those are ezBoards.)
As far as value goes: probably not a whole lot.
d20 stuff, typically, is worthless. That is monetary though... playing value is quite high.
I am unaware of any trilogy thing, but, if it was intended, it is possible that, when Rob dropped doing Codex Germania, he dropped the Dark Druids thing, too. I am sure
TLG would've published it, if they had it, and it was wanted to be published. There can be all kinds of reasons for this - maybe
RJK wanted more money, maybe
TLG wanted things delivered faster... I don't know, since I was just "joining" around then. Only Steve and Rob can say - everything else is speculation and I would lay "blame" on nobody without having any of the facts (which I don't have.)
New TLG Forums
In case you were curious. There is even a section for talking about Rob's
TLG products and other works.
Those who can, don't. Those who should not, do.