I can't stand sifting through servers. I hate spending 10mins in Valve server list just trying to find a half-full server. MK was some kind of wonderful blessing - just jump in, and your in a game, always with at least two other people.
Also, to be honest, although the extenson of the DS network on Wii is, in my opinion, something positive, it's extraordinaly difficult to take IGN seriously as a full account of events. And if there's no hub, why does it have a "Home" button? Is that just for the VC?