Blizzard has announced the Echoes of War soundtracks are now available on iTunes store allowing you to purchase individual tracks or the whole album.

Blizzard Quote:
Head on over to the iTunes store to get your copy of one or all of the 15 unique arrangements from Echoes of War: The Music of Blizzard Entertainment. This new album was recently released on CD, and has now been added to iTunes as well. It features 90 minutes of music in all, based on tracks from our games, including the upcoming StarCraft II and Diablo III. Individual tracks are available on iTunes for 99 cents each. For more details, check out the Echoes of War site or head to the Eminence Online Store to order a physical copy.