They tried to slip some crunch into one of those Ampersand columns again. This time we get a variant fighter. Seems interesting enough...I’m sure this book will be one I am dying to purchase upon release.
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New Build: Tempest Fighter

Rather than a shield or a big weapon, you have specialized in fighting using a weapon in each hand.

You see it as the best of both worlds—given the right training, you can deliver good damage and make up for the lack of a shield with deft parrying. Strength remains any soldier’s bread and butter, and good battlefield awareness—Wisdom—is a must. You also rely on speed, maneuverability, and agility—Dexterity—to get your dirty work done. Constitution is a tertiary ability for you, granting useful staying power against foes not so easily fooled by your fancy footwork and feints. The Tempest Technique class feature is designed to complement this build.
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Suggested Feat: Two-Weapon Fighting (Human feat: Two-Weapon Threat*)
Suggested Skills: Athletics, Intimidate, Streetwise
Suggested At-Will Powers:dual strike,* footwork lure*
Suggested Encounter Power: funneling flurry*
Suggested Daily Power: tempest dance*
*New option presented in Martial Power
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Tempest Technique
When you wield two melee weapons, you gain a +1 bonus to attack rolls with weapons that have the offhand property.
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You gain Two-Weapon Defense as a bonus feat, even if you don’t meet the prerequisites.
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When wearing light armor or chainmail, you gain a +1 bonus to damage rolls with melee and close weapon attacks when you are wielding two weapons. This bonus increases to +2 with weapons that have the off-hand property.
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At-Will Powers
Dual Strike
Fighter Attack 1
You lash out quickly and follow up faster, delivering two small wounds.
At-Will Martial, Weapon
Standard Action Melee weapon
Requirement: You must be wielding two melee weapons.
Target: One creature
Attack: Strength vs. AC (main weapon and off-hand weapon), two attacks
Hit: 1[W] damage per attack.
Increase damage to 2[W] per attack at 21st level.
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Encounter Powers
Distracting Spate
Fighter Attack 1
Your flurry of feints and strikes leaves your foe’s defenses unsteady.
Encounter Martial, Weapon
Standard Action Melee weapon
Target: One creature
Attack: Strength vs. AC
Hit: 2[W] + Strength modifier damage, and the target grants combat advantage to you until the end of your next turn.
Weapon: If you’re wielding two melee weapons, the attack deals extra damage equal to your Dexterity modifier.
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Funneling Flurry
Fighter Attack 1
With snakelike strikes, you force two of your enemies to move where you want them.
Encounter Martial, Weapon
Standard Action Melee weapon
Requirement: You must be wielding two melee weapons.
Targets: Two creatures
Attack: Strength vs. AC (main weapon and off-hand weapon), one attack per target
Hit: 1[W] + Strength modifier damage, and you slide the target 1 square.
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Weaponmaster’s Lure
Fighter Attack 23
You make a passing attack, throwing your foe off balance. With a shove, you send him stumbling away as you switch positions with him.
Encounter Martial, Weapon
Standard Action Melee weapon
Requirement: You must be wielding two melee weapons.
Target: One creature
Attack: Strength vs. AC (main weapon and off-hand weapon), two attacks
Hit: 2[W] + Strength modifier damage per attack. If one attack hits, you can swap places with the target. If both attacks hit, you can swap places with the target and slide it 3 squares. If you have combat advantage against the target, each attack deals extra damage equal to your Dexterity modifier.

*Edit: Added link