I was thinking a tinker or inventor shop, and a book/paper maker.
as long as pvp stays a completely optional part of the game (including the ability to develop at nearly the same pace) and "farming" other players isn't the norm I don't mind it but am not thrilled for it (more granite means lower cost for upgrades and pvpers will want the weapons we produce so greater profits so it might not all be bad).
I really want the tech trees though.