GameDaily has the story, that’s informative and well worth your time. But here’s the really juicy part:

Players can either download songs to the Wii System Memory or store songs on a SD Card, called the “Rock Archive”. When you want to play songs from the Rock Archive, players can create a custom set list, and then choose a venue and play!

Thanks, SD Cards! What’s more, it sounds like the Wii version of Guitar Hero World Tour will match its 360/PS3 counterparts in every way, including both online cooperative and multiplayer, create a player mode, and the music editor.

Developer attitudes and excuses sure do change once you’ve established yourself as the leading console.