It addition to this announcement regarding Nintendo's "Virtual Console" online network, it's also been revealed that TurboGrafx games will be available for download.
Add this to the previous announcement of N64, SNES and NES games. Specific game titles are yet to be announced.
Nintendo seems to have caught a recent trend of coming up with new and innovative ways to separate me from my money.
Those scoundrels!
Source: IGN Revolution