The new iTunes pricing
Instead, the majority of songs will drop to 69 cents beginning in
April, while the biggest hits and newest songs will go for $1.29.
Others that are moderately popular will remain at 99 cents.
DRM will change too, here is much more information. This is first a way to raise prices, yet without the consumer seeing nothing in return. But it’s also a sign of the maturing of the market. The most popular songs will be less of a loss leader for the hardware. Relaxation of DRM suggests that Apple fears long-run competition from less regulated sources, including CD burning from friends. Most of all this is a sign that the music business continues to experience economic troubles. You could call it the "do anything to increase revenue now" strategy. For 30 cents a song you can make your entire current collection DRM-free.
By the way, on DRM and related issues, I recommend the new James Boyle book Public Domain. The book is free and on-line here. You can buy it from Amazon here.