Here we are once again celebrating an iTunes Birthday — next year, it will be bar mitzvah time. Before you go to look for your yarmulke, take a moment to look back on this mother-to-many Apple products.

Since the app that changed music forever launched on January 9, 2001, Apple has shed bellwethers like Mac OS Classic, PowerPC and the PowerBook while rolling some of the most storied devices in history.

It was twelve years ago today that Steve Jobs introduced iTunes and Apple’s digital hub strategy to the faithful at the 2001 Macworld in San Francisco. Whereas the underpinnings of the original app were Casaday and Greene’s SoundJam MP (shown above), which brought the Napster revolution to the fairer platform, iTunes was an Apple original.

Since that fateful first Moscone Center iTunes birthday, the app’s progeny has included not only iPod, iPhone and iPad, but also a bevy of world-beating digital media outlets — Music, Books, Apps, iTunes U, Movies, Podcasts and TV Shows.

Although Apple stopped using the marketing phrase years ago, I think Steve’s digital hub strategy is working out pretty well.

But, wait a second — will we be celebrating iTunes bar or bat mitzvah?

What’s your take?

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Related posts:
— What’s New in iTunes 11
— Original iPod: Happy Eleventeenth Birthday
— iTunes Store: Happy 9th Birthday
— Mac OS X: Happy Eleventeenth Birthday
— iTunes: Happy 11th birthday