Am I the only one who just found out about this? Anyway, just thought I'd add it to the site. Here's the second soundtrack to Minecraft, dubbed Volume Beta.
From the Minecraft Wiki:
"The album includes 30 songs for a total length of nearly 141 minutes. It features several music tracks among which some are expected to be added to the game in the future (possibly for the Nether and The End), the music discs which were missing from the previous soundtrack and several others inspired by the game."