At the MacWorld conference today (Jan. 6) in San Francisco, Apple Inc. confirmed reports that all four majors were now onboard to deliver DRM-free music through the iTunes Music Store.

The company will also embrace a variable pricing model starting in April; the price points are listed as 69 cents, 99 cents and $1.29. The company said more songs will be priced at 69 cents than $1.29.

iTunes began offering 8 million of its 10 million songs in a DRM-free format, today, and the remaining two million songs offered will be offered DRM-free by the end of March.

Additionally, iPhone 3G users can now preview and purchase music from iTunes over the phone's built-in 3G network.