I like the music used for the Wii Channels. Each song is simple, but fits each channel really well. The Nintendo Channel mainly features relaxing minimalist songs, except it also has an "in your face" retro style song.

Complete Soundtrack

If you know about torrents, please use this option and seed.

The torrent is for those people who want 320 kbps audio bitrate. For everybody else, you can download a zip of everything in the Music Pack section.