Steve Jobs and several expected products didn't make an appearance: VP of worldwide marketing Phil Schiller gave Apple's keynote address at the Macworld Conference and Expo -- taking place this week in San Francisco's Moscone Convention Center -- instead of Jobs, who is ill. But one long-rumored development did grace the stage for Apple's last Macworld.

The company is removing digital rights management (DRM) restrictions from songs available on its iTunes music store. So you'll soon be able to copy songs bought at iTunes as many times as you like. And use those songs on whatever MP3 player you own.

Apple is also adding $0.69 and $1.29 per song pricing to iTunes traditional $0.99 per-track pricing model. It'll be up to record companies how much to charge for each track. It is expected the highest price level will be reserved for new songs, while the vast majority of older tracks come in at $0.69.

Last but not least, for iPhoners (at least), you can now buy and download songs to Apple's smartphone over a 3G wireless connection. Before, you could only do this over a Wi-Fi connection. Since its inception last summer, the iPhone App Store's been open downloads over both Wi-Fi and 3G, for example.

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