krik on 02 January 2008
Saturn (as well as Dreamcast and most other Sega consoles) has been on GameTap (http://www.gametap.com) for a long time.
The only thing I can tell you is that Saturn is pretty hard to emulate so I'm not so sure it can be done on a Wii.
PS: You can request me (using VGC's mail system) a free 3-month pass to GameTap
