There's like 409 Virtual Console titles released on North America's Wii Virtual Console (not counting the ones Nintendo may have removed from the service).
Here's the breakdown according to Wiki:
NES: 93 titles
SNES: 68 titles
N64: 21 titles
Sega Master System: 15 titles
Sega Genesis titles: 75 titles
TurboGrafx-16/TurboGrafx-CD titles: 56 titles
NeoGeo: 51 titles
Commodore64: 9 titles
VC Arcade: 21 titles
I sort of worry that we'll only ever see a moderate percentage of Wii VC games transferred over to the Wii U VC in the foreseeable future. I know it's understandable as each one takes man-power and resources, but still.