i dont think nintendo fully understands the importance of online play since "the death of the arcade" .. nobody goes out and has Street Fighter matches in person anymore (sure maybe a couple of us, i played street fighter at the movies the other day).
the arcade audiacne has pretty much moved to online game play, and both MS and Sony (MS more) fully understand it and put alot of focus on making sure that its apart of almost every mainstream title. nintendo on the other hand uses online as an after thought... i really hope they get with the times soon and give us a Xbox Live or Playstation Network like function soon.