We are wiping items and probably NPC favor levels, possibly favor-quests... the exact list hasn't been decided. But what we have always said would NOT be wiped is skills. Your skill levels will continue into the live game. People who say otherwise are trolling you or are very confused.

(Edit: and we're not wiping things at Beta, only at launch. Beta will start when the game is on Steam Early Access -- relatively soon. Launch is when the game is out of early access -- probably late 2018.)