Two things I'd like to mention:
a) Cave Story is freeware. And like 2mb.
b) cave Story is also on WiiWare channel, giving you another reason to play the Wii (there aren't too many sadly).
I'm going to download this baby!:
http://www.dcisozone.com/downloads/1...hacksmods.html
329 (!) hacks/mods for Super Mario World! Oh my god!
ON THE DREAMCAST! Since Mario World, along with Earthbound and scant few others, is the only game to actually run 100% on the Dreamcast (most games run around 90%; unfortunately, Yoshi's Island runs 40%, which is a testament to how insane that game is and how much juice it sucked out of the SNES..), this will be
quite the experience.