Khyber's Harvest is one of many things you can get on Free RPG Day, which is a Dungeon & Dragons adventure written by Keith Baker, and it includes a kalashtar invoker as one of several pregen characters. While the poster wouldnt go into many specifics, he did reveal that one of the racial abilities is telepathy 5 as a language, they get +2 to Wisdom and "something else" (probably Intelligence or Charisma), and have a racial power that buffs their allies' Will defense.
This sparked some
complaining debate about the overall power of telepathy and how it might invalidate languages and the Linguist feat. Keith Baker himself showed up and made many clarifications, alleviating the bitching concerns about its abuse.
Oh, and he also dropped some vague information on dragonmarks.