Posting my opinion too on this build.

First a general thought.
I won't be popular here, but i find it hard to justify making TWF paladins. It just makes you... a bad ranger. The Paladin is a great class, and it's strenght, above all, is it's versatility. It can fight, survive, heal. Spike DPS, Steady DPS, etc.
By taking this versatile but feat starved class and going TWF, you are pidgeon-holing yourself into a role that is best performed by rangers, some fighters, rogues and monks. It requires you to spend many feats, and to have a solid DEX, both of which spread your ressources even more.
So, what is the goal here? If it is just to be a TWF DPS build, well, make a Tempest-Ranger. But forgetting TWF, you can drop dex and feats, and have better charisma/str/con/wis.
Just my 2 cent.

Paladin options
Now, Paladin-wise, here is a few thoughts.
FEATS:
Extend will provide you with a 4 minute Zeal, and, once mod 9 hits, a 4 minutes DF. Definitly worth it. Works just fine with Madstone Boots.

Extra Turn Undeads will give you 4 more shots, taking my paladin to 15. That's 15 minutes of Divine Might 3, very nice. 1 per portal, as i like to say. Also, if you go KOTC, the turns will serve as stun demons. We'll see how good that is.

Precision (dex 13 required) is a usefull stance when you dont need DPS (and power-attack) but just need to hit mobs (stat dmg, vorpal, disruption, paralysing, smiting, banishing). +4 to-hit is great, and, if you fill like dual-wielding vorpals, then covers the -4 penalty from using 2 weapons (but, i admit, does not give the extra attacks.)


ENHANCEMENT:
I see many comments on the cost of Bulwark 4. Ya, it is costly. But remember, that AC benifits all the team, and... that is why people invite you. Look at all the AC builds. They all count +5 paladin aura in their break down (funy, since many dont invite paladins in raids). Everybody assumes the paladin aura, and yet people dont advice taking it. Wierd uh?
Me, i consider Bulwark to be like the Bard songs. Make it the best possible, it's why people love you.
Also, i enjoy the faith Sovereignty. Gives you +1 on longsword (go vorpals), and the advance faith is a 1k heal every 10 minutes, very nice if you use it (many keep it just in case, and never do, me, i use it 2-3 times per quest, that's what it's there for).
It also fully heal negative levels, so very nice for that noob who got beholdered... AND, it clears res sickness, so use it on the tank who just died in VoD...