An excellent write-up on Nintendo's SFC add-on which allowed you to download and play games exclusively designed for it:
http://www.blamethecontrolpad.com/bsx/bsx.htm
http://www.blamethecontrolpad.com/bsx/bsx2.htm
Games mentioned in the article:
BS Zelda No Densetsu
Radical Dreamers: Nusumenai Houseki
BS F-Zero Grand Prix 2
Excitebike: Bun Bun Mario Battle
BS Zelda no Densetsu: Kodai no Sekiban
BS Super Mario USA Power Challenge
Treasure Conflix
Chrono Trigger: Jet Bike Special
Spriggan Powered BS
The author of the article is also a very good reviewer who specializes in Japanese arcade games. Check his reviews:
http://blamethecontrolpad.com/articles.htm
I might try to see if I can get him to join the Insomnia crew.