So no takers for WiiWare? There really are good games available on the service... although apparently nobody played them. Oh well, I'll add one a day until someone else speaks up or the list is full.
1. Castlevania: The Adventure ReBirth
2. Arkanoid Plus!
3. Pokemon Rumble
4. Bit.Trip Series
5. Art Style Series
6. Cave Story
7. Jett Rocket
8. FAST - Racing League
9. Mega Man 10
10. MDK2
11. Excitebike: World Rally
12. Final Fantasy IV: The After Years
13. Swords & Soldiers
14. LostWinds: Winter of the Melodias
15. And Yet It Moves
16. Fluidity
17. World of Goo
18. Tomena Sanner
19. MotoherozYes, the name is stupid... but this game was developed by Red Lynx, who are also known for their Trails HD. That's a strong pedigree and while MotoHeroez is clearly a different game it's just as exciting and worth playing. Tight controls, imaginative challenges, great presentation. Once you start playing you'll be hooked for hours.