I'll update..I own 25 original carts at the moment, with a few more still on my 'to snag not at full price' list:
I love this system!
Heh, wow, it's been a while..I own double this amount now!
Animal Crossing: Wild World
Big Brain Academy
Bomberman DS
Brain Age: Train Your Brain in Minutes a Day
Break 'em All
Bust-a-Move DS
Castlevania: Dawn of Sorrow
Children of Mana
Clubhouse Games
Contact
Cooking Mama
Elite Beat Agents
Final Fantasy III
GoldenEye: Rogue Agent
Kirby: Canvas Curse
Konductra
Lego Star Wars II: The Original Trilogy
Magical Starsign
Magnetica
Mario & Luigi: Partners in Time
Mario Hoops 3 on 3
Mario Kart DS
Mario vs Donkey Kong 2: March of the Minis
Megaman ZX
Meteos
Metroid Prime Hunters
Metroid Pinball
Nanostray
Need for Speed Underground 2
New Super Mario Bros.
Nintendogs: Lab & Friends
Phoenix Wright: Ace Attorney
Polarium
Rayman DS
Sonic Rush
Sprung
Star Wars Episode III: Revenge of the Sith
Starfox Command
Super Mario 64 DS
Super Monkey Ball: Touch & Roll
Super Princess Peach
Tak: The Great Juju Challenge
Teenage Mutant Ninja Turtles 3: Mutant Nightmare
Tetris DS
Touch Detective
Trace Memory
Trauma Centre: Under the Knife
Ultimate Spider-Man
Viewtiful Joe: Double Trouble
WarioWare Touched!
Yoshi's Island DS
Yoshi Touch & Go
Zoo Keeper
I have never bought so many games for a system this fast, ever. Some of them are borderline stinkers, but you can't win 'em all.
I've still got a pre-order for Castlevania: Portrait of Ruin on the way (hell yeah!) and any other good DS games that come out between now and Christmas may find their way into my hot little hands too.
Long live the DS.