Well, this is HUGE title for me. I have two gaming brothers and about a dozen gaming friends right down the street, each with a GBA and the cash to buy the rather inexpensive link-up cable. We're all true Zelda fanatics through and through, and we're complete multiplayer whores. With Four Swords, we'll be getting the best of both worlds; competitve and cooperative action in a nostalgic, highly stylized Zelda world, that you can explore big-time on the TV and secretly on the GBA screen. For people like us, this is no small game, but a rather worthwhile one. Games like this, coupled with some pizza and pop, equals fun all through the night, and judging from the very positive impressions the Four Swords is receiving, there's no doubt it'll be great fun. I really want this game --- it's honestly impressed me more than most of the games at this year's E3, especially after seeing it in motion at Nintendo's E3 website.
Nintendo, being able to afford any losses they may take on selling this game to a somewhat limited audience, is very justified in following this game through (though I can't say the same of Tetra's Trackers). Those of you without a GBA in the first place should just go and pick one up --- they cost only a bit more then a GC game, they have the best library of titles, and they are the best gaming system Nintendo has delivered in a while. Buy a GBA so you'll be able to enjoy Four Swords, and stop whining.