I'm happy for that Italian top8 and all and bebe and folks have apparently tested this more than I have tested anything ever but I have to disagree with a couple of things here.

It is great to see innovation in budjet deck building. However, I simply cannot find a reason for not using the "budjet staples" in attempts to beat the "decks to beat". Null Rod and and Force of Will happen to be huge in the two (probably) most important matchups: Tendrills and CS, not to mention Stax. As for the Force of Will question: not only are Mages the best thing white has to offer in the first place but I really wonder why Curiosity is not seeing play in these decks. Not that many blockers around. Complementing the 12 blue cards mentioned so far with cards like Brainstorm, Stifle, Spiketail etc. should be easy. Samurai, True Believer and Kami are hot but can't do everything by their selves. Building a manabase to support blue and double white consistently is doable.

Against CS:
bebes original build has lots of good stuff here. (Replacing javelineers with FoWs won't harm you though.) Null Believer is huge.

Against Tendrills:
True Believers shine as do Null Rod and FoW.

Against Stax:
Mages and Samurai are golden. Stifle buys some beautirul time. FoW.

Against Oath:
Not much you can do. bebes weenies might even be better here . StP might help game 1. They might also be useful in games 2 and 3. Or perhaps they will side in angels or just smash you with a Morphling.
Magi, Kamis, the usual.

First of all forgive me for commenting on a matchup I have little experience in. Annul might be good if it takes time for them to find the oath. Bouncers, on the other hand, look solid. Neither the bouncers nor the drakes can, however, touch the angels boarded in games 2 and 3.

It would seem that, considering the infamous synergy between daze and wurms,  the only thing you can do against oath in the first 3 turns is
a) get rid of Oath of Druids (md Naturalize || sb Ray of Revelation)
b) resolve a Bouncer (game 1)

Postboard targeted creature removal sucks, right?

Why are you (all) running blue fetches in U/G Madness? Heath/Foothills allows for 1st turn brainstorm, second turn shuffle -> beats with two basics out. It is relevant to beating oath because you will have better cards in your hand

How have old men and Annuls been working against combo? I just feel that StP is The reason to splash white. It is true that both Annul and old men pitch to FoW and that old men can do some serious beatdown against combo . Swords are just too good most of the time.

Sideboard question: Have you tried running Serenity over Energy flux?

-2 Stifle
-1 Crucible
-2 Voidmage

+2 StP (!)
+1 Meddling Mage
+2 MisD / Disenchant / whatever

I Wonder what I am doing wrong but I never have a blue open to stop anything of importance with stifle (save smokestack). The Crucible does absolutely nothing in this deck. The way I get it fish is not supposed to lock anyone and Disenchant would be a lot better at fighting opposing Crucibles. Crucible (or B2B or Bloodmoon) should not, however, be a big problem. Add a plains as Mikey suggested. I am currently running 4 Flooded Strands and 2 Windswept Heaths and getting a turn 2 mage with just basics out is easy.

By the way give me one (1) good reason not to run 4 swords.

So the regeneration isn't very useful early on. Islandwalk, however, is insane especially when you are not running red for mancers (which you should).

The added card disadvantage engine (careful study + spirit guide) probably works better without the amoebas but it sure makes mongrels weaker.

I don't like the manabase either. Unlike the more "orthodox" lists you eventually need 4 mana and being vulnerable to nullrods, oxidizes and wastelands (crucible) isn't going to help. Why don't you cut the artifacts and run 6 fetches and one less tropical. Works well since you'll fetch basics 90% of the time anyway, right?

If you play against "cheap" aggro (sligh, rg, goblins, etc) run chalice black and just shut them down. If you don't like spheres, at least reavers will be there to block the lackeys and other pests until your shade becomes big enough to take care of himself.

Gilberry: about mindtwist: A first turn mindtwist off a dark ritual sounds like 2 for 2 (or 3) trade when you could have played a negator, duress-sink, duress-nullrod etc.. I hope you hit their only land.

The usual: cut vampiric and twist for better disruption or better threats. Cut necro as well and add 3 Flesh Reavers. They shine against.. well, decks.

No splashing please.. With 4 chalices and 3 Nullrods you have a shot at anything with power (even against stacks sometimes with 9+1 ways of getting rid of workshops).

disruption: (15)
4 Duress
4 Sinkhole
4 Chalice of the Void
3 Nullrod

creatures: (15)
4 Phyrexian Negator
4 Nantuko Shade
4 Hypnotic Specter
3 Flesh Reaver

other: (3)
1 Demonic Tutor
1 Demonic Consultation
1 Yawgmoth's Will

mana: (27)
17 Swamp
4 Dark Ritual
1 Lotus Petal
1 Strip Mine
4 Wasteland

Card Choices:
No Hymn: Hippy and duress are enough to force things through.
Flesh Reaver: They say it's a metagame call but I have found Wretch too slow sometimes even against dragon.
No Necro: It sounds stupid but the BBB really slows the deck down. Perhaps in a powered deck but the 4 rituals are not enough to play the drawn cards fast enough.