Actually the server
lore is first and second editions, because we're in the 1350s, pre-Time of Troubles. Setting wise, we haven't reached 3rd edition (and 3.5) yet because that takes place in the 1370s.
And, once again, there is no 3.5th version of Forgotten Realms Campaign Setting or Faiths and Pantheons. They weren't needed, because 3.5 is still part of 3rd edition; it's still one edition for the sake of setting content. That's why it was just given a half-edition. It
wasn't an entirely new edition and didn't require the re-release of old content, because the rule changes were relatively few, were for the core handbooks only, and didn't affect the setting material.
See here. Where changes were required, errata was released. And none of that errata changed the thing we're talking about here, as I already pointed out.
I've quoted content from the books on
this list. Half of that list is 3.5 books, because all the 3rd edition books, regardless of if 3.0 or 3.5,
all constitute FR's setting material for that time. You can't say "you can only look at 3.5" as if 3rd and 3.5 are entirely different, because they aren't; they're meant to be used together.
The closest thing to a 3.5 campaign setting re-release was Player's Guide to Faerun. Which... didn't change the nature deity list.