After reading the rules, it appears that as a half action, a character can make 2 different lightning attacks while duel wielding. Am I reading this correctly? So that means that character could not only move into combat, but then unleash a flurry of attacks all in one turn?
Swift Attack, Lightning Attack, And Two weapon wielding.
Nope in DH1, you are limited to 3 with 1 weapon and 1 with your off hand one and it a whole action.
Errata, p.8 and p.12: "If you have Lightning Attack and Two Weapon Wielder (Melee), you get the second and third attacks only with one melee weapon, so you will get three attacks with one weapon and a single attack with the other."
RAW is 3 with one weapon/hand (usually the primary), and 1 with the other (usually the offhand/secondary).
If you're Ambidextrous, I could probably be talked into allowing 2 attacks with each, instead of 3 and 1, assuming both weapons are usable with Lightning Attack.
On the other hand, RAW TWF plus Lightning Attack makes a compelling argument for a powerfist/powersword combo. Sword them up for three attacks and burn parries/dodges, and powerfist them in the face