The launched much-anticipated digital music store with nearly 2.3 million songs is not protected against copying. The store, Amazon MP3, lets shoppers buy and download individual songs or entire albums. The tracks can be copied to multiple computers, burned onto CDs and played on most types of PCs and portable devices, including Apple Inc.'s iPod and Microsoft Corp.'s Zune.

Up to 1,000 new indie titles to be made available in HD DVD through the CustomFlix DVD on Demand Program; Sundance Channel original series, “Big Ideas for a Small Planet,” to be among first HD television offerings on Amazon.com.

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Amazon.com opens new market to sell digital music. The new market will be available later this year.