Holy bat damage! (Diablo 1.1)
The Assassin's Phoenix Strike Finishing Move has been greatly upgraded. The exact level of damage is hard to determine because she's up to slvl 27 and there's other skills that interact to boost the damage of the individual elemental portions of the move.
There's also another screenshot showing off Claw Vipers in the Worldstone Keep. Good stuff!
Not that this statement is worth anything but Bill Roper said that conservative estimates places the patches release at around the first week of June.