The Legend of Zelda: Four Swords Adventures is coming to DSi Ware next week on September 28th.  The game will be completely free for a limited time, almost 5 months in total, until February 20th 2012.  While the original GameBoy Advanced / Gamecube title required link cables between the systems to play the four player co-op mode, the new game will allow for wireless LAN play between Nintendo 3DS,  Nintendo DSi and Nintendo DSi XL systems.