Is This The Beginning of a Price War With iTunes?

"Amazon.com, which is a distant No. 2 to Apple Inc. as a retailer of downloadable music, has upped the ante or, rather, lowered its prices to compete with iTunes."

Dropping $0.20 USD from their normal price of $0.89 USD, this is quite a deal from Amazon.com. iTunes has 70% market share and Amazon.com is far back with only 10%, so is this a shot across the bow so to speak to steal some of iTunes customers? I've purchased, and will continue to purchase, music from Amazon.com with deals like this in the mix. Amazon.com makes it pretty easy to add the music to your iTunes library anyway so it isn't that much more difficult than buying directly through iTunes. I guess you could label me one of those "opportunistic" cherry pickers the article talks about. What about you, where do you get your music?