I have four GBAs, a 4-player cable, and a copy of the game with three flash carts and I've never been able to successfully organize a single session. I always wanted to access that last dungeon in LttP.
Hopefully this game being free and being wireless will make it a little more accessible.
FYI, I remember that there was some sort of action replay code or patch that allowed you to get into the extra dungeon without other people. It just made the dungeon a little bit more challenging because you either couldn't control the other Links or could only control one of them at a time or something (don't remember).
Just saying, it's probably still out there if you wanted to go back and try it.
And I never understood why Nintendo never bothered to do this with the DS before now. Seriously, it's been about five years, and if the DS can handle games like Maple Story, Mariokart, and Harvest Moon over the wireless, it could handle Four Swords too.
Also:
QUOTEwell online + nintendo, is already shakey, throw in voice chat, on a handheld and shit goes downhill