Check this out: http://www.archive.org/audio/audio-details-db.php?collection=opensource_audio&collectionid=xoc_SMW
A fellow by the name of Jason Cox covered the entire Super Mario World soundtrack, with all sorts of different instruments. It's really awesome.
The first song on there is my favorite. I love how instrumental diversity and how well he integrates it all. Excellent find, this guy has some real talent.
^_^Hey I think Jason Cox is the guy who produced the Gorillaz(His name is on the DVD OMG MURDOC IS SOOOOOOOOOOO HOT!!!!) i'll give this a look!!!!!!!!^_^