31 Full Tracks:
1-down, Airship Boss, Airships, Castle, Course Clear Old School, Course Clear, Evil Themes Remix, Forest, Game Over, Koopa Kid, Mario Bros. Remix, Peach Castle, Rescue Peach, Results Screen, Spooky, Credits, Timed Switch, Title, Underground Remix, Under water World 1-9 Maps, + More
Here is a new rip of the New Super Mario Bros. Wii Soundtrack. This one includes 63 tracks at 192Kbs! The link was dead for a while, but I re-uploaded the .zip file and also added a link to a torrent of the file.