If you have two weapons, can you sneak attack with both at once? So if you had two short swords and surprised an opponent, can so sneak attack them twice in the same round?
Sneak attack is a damage bonus that the Rogue gets anytime the prerequisites are met..
see page 47 of the PG. The second sentence is the key.
if Sneak attack was a Action then it would not be possible.. Sneak attack is not an action but a "bonus" - when the requirements are met you get the damage.. ie flanking.
so.. never ever ever get between two rogues who both have two weapons.. it will hurt.. a lot.