What games on Wiiware are worth preserving.
Good North American Wiiware games that cannot be purchased anywhere else AFAIK:
Final Fantasy Crystal Chronicles: My Life as a King
Dr. Mario Online RX
Art Style: Orbient
Bomberman Blast (although apparently had a retail release in Japan???)
Art Style: Cubello
Art Style: Rotohex
Alien Crush Returns
Space Invaders Get Even
Maboshi's Arcade
LIT (PC version appears to be a different game)
Onslaught
Gradius Rebirth
Bonsai Barber
Adventure Island: The Beginning
Final Fantasy Crystal Chronicles: My Life as a Darklord
Overturn
Mr. Driller W
Contra Rebirth
Driift Mania
Excitebike: World Rally
Pokemon Rumble
Eco Shooter: Plant 530
Castlevania: The Adventure Rebirth
Muscle March
Blaster Master: Overdrive
Art Style: Light Trax
Art Style: Rotozoa
Jett Rocket
Dive: The Medes Island Secret
And Yet It Moves (Game exists on other platforms but Wiiware version AFAIK is only one that allows the level to be rotated dynamically rather than in 90 degree angles, which fundamentally changes the gameplay)
ThruSpace
Snowpack Park
Fluidity
Liight
FAST Racing League
Vampire Crystals
Also Bit Trip Beat and Flux are best played on Wii due to tilt controls. Other games like NyxQuest and Lost Winds 1/2 were designed around joystick + pointer controls and play best on Wii (though the PC versions are still good).