Here's my list and this is not sales leaders, but best games as far as i see them:
PS3: 27 games - 13 = 14 exclusive games.
GTA IV
Resident Evil 5
Ratchet and Clank: Tools of Destruction
Heavenly Sword
Little Big Planet
Stranglehold
Lair
MGS 4
Assassin's Creed
Warhawk
Devil May Cry 4
Half Life 2: Orange
Ninja Gaiden Sigma
Darkness
Eye of Judgment
Tekken 6
Uncharted: Drake's Fortune
Mercenaries 2
Killzone 2
Quake Wars: Enemy Territory
Jericho
White Knight Story
LA Noire
Unreal Tournament III
Army of Two
Kane & Lynch
GT 5
360: 26 Games - 13 = 13 exclusives
GTA IV
Resident Evil 5
Mass Effect
Stranglehold
Bioshock
Assassin's Creed
Devil May Cry 4
Left 4 Dead
Half Life 2: Orange
Huxley
Blue Dragon
The Darkness
Too Human
Shadowrun
Mercenaries 2
Quake Wars: Enemy Territory
Jericho
Tenchu Z
Lost Odyssey
Eternal Sonata
Unreal Tournament III
Army of Two
Kane & Lynch
Two Worlds
Forza 2
Halo 3
Wii: 10 games - 0 = 10 exclusives
Super Mario Galaxy
No More Heroes
Super Smash Bros. Brawl
Manhunt 2
Resident Evil: Umbrella Chronicles
Mario Strikers: Charged
Metroid Prime 3
Mysims
Pokemon Battle Revolution
Guilty Gear XX: Accent Core
Games that are being released on PC and 360 I counted as 360 exclusive and games that are not likely to come out this year I left out.
34 exclusive games that I am really looking forward to with almost 1/3 going to each console. It's a great coming 6 months for being a gamer and it's the reason why I had to get all 3 consoles.
Edit: lol forgot some key games that don't appeal to me like Halo 3 and GT 5 and Forza 2