Splinter Twin
A Modern deck, by Samuele Estratti
1st place at a tournament in Philadelphia, Pennsylvania, United States on 2011-09-04
As reported at http://www.wizards.com/magic/magazine/article.aspx?x=mtg/daily/eventcoverage/ptphi11/top8decklists

Maindeck:

Artifact Creatures
2 Spellskite

Creatures
4 Deceiver Exarch
3 Pestermite

Enchantments
4 Splinter Twin (Banned in Modern)

Instants
2 Dispel
1 Disrupting Shoal
1 Lightning Bolt
2 Pact of Negation
4 Remand

Legendary Creatures
2 Kiki-Jiki, Mirror Breaker

Sorceries
3 Firespout
4 Ponder (Banned in Modern)
4 Preordain (Banned in Modern)
1 Sleight of Hand

Basic Lands
5 Island
3 Mountain

Lands
1 Breeding Pool
4 Cascade Bluffs
3 Misty Rainforest
4 Scalding Tarn
3 Steam Vents

Sideboard:
2 Engineered Explosives
2 Spellskite
3 Blood Moon
2 Ancient Grudge
1 Deprive
2 Dismember
2 Lightning Bolt
1 Vendilion Clique