I stated some of these ideas in my Ds beneficial to wii topic
much like the xbox live package that comes with a keyboard/headset, with nintendos new service they could do that in 2 different ways
#1.) The DS package- a package that comes with a cartridge that plugs into the GBa area of the DS and turns the touch screen into a key board for the wii and comes with the DS headset. also the DS itself can be packaged with these for future buyers
#2.) The regular package- pretty much the same as the 360's, a basic keyboard and headset, nothing really new.