Erm, lets's see...

Wii:

- Prime Trilogy
- The Conduit
- Mario Kart Wii
- NPC Pikin
- Madworld (just got this, haven't played it yet)
- HOTD Overkill


DS:

- Layton 2
- Kirby Superstar
- Ace Attorney 4
- Scribblenauts

Probably more, but can't think of 'em right now.

You could say that, I just bought my DS copy this week.  ^^

Though it's a little disturbing I don't see more Ghostbusters on peoples list.  ;_;

demon soul
killzone 2
uncharted 2
resident evil 5
street fighter

I was in Movie Gallery, yesterday and I saw a number of old Xbox games selling for $3-$5. I'm going to check Wikipedia and see which ones are backwards compatible. I may be adding to the list, shortly. But why do I do this? I already have more than enough great games. They'll just end up on the shelf. I still need to finish Uncharted 2. I have no willpower.

Go straigt to the horse's mouth

Halo Wars, Prototype, ODST, Splosion Man and Shadow Complex.

Wii:
NPC! Pikmin (got sick of waiting for NPC! Pikmin2 so i sold it to gamestop :( and i terribly regret it)
Nights: Journey of Dreams
Klonoa

WiiWare:
FFCC: My Life As A Darklord

DS:
Trauma Center 2
Final Fantasy Tactics A2
Pokemon Platinum
Pokemon Ranger: Shadows of Almia
SMT: Devil Survivor

Those last 3 i actually just ordered like 10 minutes ago from amazon with their 3 for 2 deal.

PC:
World of Goo

I plan on buying for the remainder of the year:

FFCC: Crystal Bearers
FFCC: My Life As A King
Crystal Defenders R1
LostWinds
Pokemon Snap!
Final Fantasy IV
NSMBWii
Wii Sports Resort Bundle
Little Kings Story
The Legend of Zelda: Spirit Tracks
Phantasy Star 0

Edit: I forgot World of Goo for WiiWare

I'm only gonna name the ones for current gen consoles/handhelds:

DS:
-Lunar: Dragon Song

PS3:
-Folklore
-Uncharted and Heavenly Sword as bundle, sold HS
-inFamous
-Valkyria Chronicles
-Red Faction:Guerilla
-LittleBigPlanet

PSP:
-Persona

VC:
-Phantasy Star IV
-Super Mario RPG

Wii:
-Fire Emblem: Radiant Dawn
-Metroid Prime: Trilogy
-Resident Evil: Umbrella Chronicles
-The Conduit
-Okami (sold)

WW:
-Final Fantasy IV: The After Years
-Icarian: Kindred Spirits
-Mega Man 9 (not sure)

PS3:

Killzone 2

Resident Evil 5

Red Faction:Guerilla

Demon Souls

Uncharted 2

Madden 2010

Metal Gear Solid 4

Batman: AA

XBOX360

NBA2K10

Halo ODST

I am planning still on getting Modern Warefare 2 and Borderlands both on xbox360

Thanks, horse's mouth!

Dreamfall and Thief are my next two purchases.  I saw Sudeki there, but it's not on the list.  Too bad.  The game featured scantily clad women and was therefore a must buy.