How often does the scenario of an opponent Wishing/Researching for a Leyline'd card come up, anyways?

Shouldn't affect Leyline's functionality at all.

Yep, sounds pretty much like Vanguard. Might be fun.

The Commandeer player. The life loss is part of the Vampiric Tutor's effect and happens on its resolution.

I love Time Sieve's crazy potential. Almost definitely not very good, but fun.

Has Sygg been better than Cold-Eyed Selkie?

Heh. Nice. Better than the Wizard's forums' prank, at any rate.

Not true. (Although the rest of your answer is correct) Necropotence sets up a delayed trigger each time you use its "pay 1 life:..." ability. During the End of Turn step, all these go on the stack; once they resolve, both players get priority and must both pass it to proceed to the Cleanup step.

Zoo: Not sure that I board in Fallout. The only guys you're probably going to hit are Fanatic and...Figure, I suppose?
Fae: I'd probably drop the other Flames for a 3rd Smash, since Jitte is pretty good against you.
Everything else looks good.

To the above poster: Smash to Smithereens is definitely good with all the Moxen and Jittes running around. Also, Scepter is just slow and vulnerable.
Boseiju doesn't seem that great compared to, say, Vexing Shusher. Also, I wouldn't SB out the Vortex.

As does Valleymaker.

Your opponent was correct on Eureka. To quote one of the rulings:
"Each player gets a chance to put a card in play starting with you and going around the table to the left (unless your multiplayer variant defines a different ordering). A player may decline to put a card into play when it is their turn. The spell ends when all players decline in a row. [D'Angelo 2002/01/10]"

And yes, you have to declare whether you're attacking your opponent or the 'walker when you declare attackers. It doesn't work like noncombat damage; if you Bolt your opponent, you don't choose whether to redirect it to the 'walker until it's resolving.

Legacy - the team coverage from Worlds has some.
Extended - the coverage from PT Berlin iis the most recent, although it's pretty much all Elves. Going farther back, there's PT Valencia (Invasion-Lorwyn Extended) and PT Los Angeles. (Invasion-Ravnica) The LA coverage is no longer on the website, but you should be able to find it on Youtube.

I count 4 left - Sharahzhad, Grim Monolith, Fact or Fiction, Un-3.

Ithilanor loses to Implacable 2-1.

Gabriel Nassif wins it! Congratulations to him!

I watched it all on the webcast - it was a really great top 8.

You'll get the mana.

In.

To answer the rules question: unmorphing is a special action, not an activated ability.

// Lands
    1  Swamp
    1  Academy Ruins
    4  Polluted Delta
    2  Flooded Strand
    3  Island
    2  Volcanic Island
    3  Underground Sea

// Creatures
    3  Painter's Servant
    1  Darksteel Colossus

// Spells
    1  Mox Pearl
    1  Mox Ruby
    1  Mox Sapphire
    1  Mana Crypt
    1  Mana Vault
    1  Sol Ring
    1  Mox Jet
    3  Voltaic Key
    1  Merchant Scroll
    1  Time Vault
    1  Time Walk
    4  Force of Will
    1  Mystical Tutor
    1  Demonic Tutor
    1  Grindstone
    3  Red Elemental Blast
    1  Ancestral Recall
    1  Mox Emerald
    1  Chain of Vapor
    1  Tinker
    1  Brainstorm
    1  Yawgmoth's Will
    4  Thirst for Knowledge
    2  Reconstruction
    2  Pyroblast

// Sideboard
SB: 2  Tropical Island
SB: 4  Tarmogoyf
SB: 2  Ancient Grudge
SB: 1  Darkblast
SB: 1  Relic of Progenitus
SB: 2  Tormod's Crypt
SB: 3  Duress

My attempt at hybridizing a Painter shell with the Intuition-based combo-control Vault-Key approach. MD Red blasts, fairly consistent manabase, Reconstruction for use with Inuition, green in the board for Goyfs for aggro, etc. It seems like the blasts and multiple approaches outweigh the 2nd-tier stuff Tezzeret runs - Top, etc.

With as many Drains going around as there are now, I don't really think HT would be the way to go.

-Spell Snare over Mana Leak?
-Some mana fixing i.e. Izzet Boilerworks
-Include an LD angle with Stone Rain and/or Molten Rain?

Yes really.

A bolt wouldn't destroy the Marit Lage token, though.

Actually, indestructibility itself isn't an ability, it's just...a description, as it were. "Darksteel Colossus is indestructible" is an ability. This is why even when Humility is in play, a Marit Lage token from Dark Depths will still be indestructible.

Ancestral, other mana artifacts, mystical?

I posted this over on the mtg.com forums, but I'll reiterate it here - this was a truly excellent article. It's writing like this that makes me want to actually play Vintage beyond Workstation.

If you're going to reanimate guys, why not dump Worldgorger Dragon in and win?

Yes.

When something comes into play, you do three things in the following order:

1. Apply replacement effects i.e. "Ghitu Encampent comes into play tapped." or "As Meddling Mage comes into play, name a card."
2. Apply continuous effects i.e. "All creatures get +1/+1".
3. Check for any applicable triggered abilities and put them on the stack.

In this case, Vesuva's copying ability is a replacement effect, so you do it, choosing Growth Chamber; then the game checks for triggered abilities, sees the Vesuva-Chamber's "bounce a land" ability, and puts it on the stack.

Trickbind and Stifle don't actually "specifically" prevent it - note that the bit about how mana abilities can't be targeted is reminder text, not rules text, and thus doesn't actually have any relevance.
Basically, the game gets weird if you make mana abilities use the stack; I think the big problem is paying mana during the resolution of another spell i.e. Mana Leak.