Blizzard's confirmed at Blizzcon there will be a beta for Diablo III.
Game director Jay Wilson told G4 there will be a closed beta, most likely for friends and family of Blizzard, but you can probably place a bet it will eventually open up.
Wilson also confirmed there won't be any official mod support for the game when it releases.
Wilson also confirmed earlier tonight the game "was “way over half-way” done."
Despite that, there's still no date for it.
Watch the 20 minute gameplay demo from BC here.