The Beatles’ mystery track “Carnival of Light” may finally see the light of distribution. The BBC reports that Sir Paul McCartney has confirmed that the 14-minute track exists and says he wants the public to hear it .

Hollywood studios are using free apps on the iPhone to promote movies. Bands are also getting in the act, though not in an innovative way (yet). All this stuff proves that the iPhone has shaken up, not just stirred up, the content industry.

The iPhone and iPod touch will soon act like the handheld computers they were made to be. Third-party native iPhone and iPod touch applications will flood the market by June.

I’m writing this as Steve Jobs delivers his keynote address at Macworld Expo in San Francisco. With its theme “Something in the air” Apple’s intent is to showcase wireless technology and its uses in media.

You want wheat toast, but you have to order a chicken-salad sandwich to get it. So it is with iTunes and the iPod: there many things you can’t do, as they break some rules. But here are five easy pieces for the Mac, five easy pieces for Windows, and a few for the road, that won’t leave you holding your iPod between your knees.

The new iTunes Plus portion of the online iTunes Store is now available, offering higher-priced, higher-quality, DRM-free songs and albums you can play on any device and copy endlessly. And as of one day after it was announced, boomers rule.

At the OnHollywood conference, Arianna Huffington and Carson Daly were the most visible representatives of the professional media that has taken the plunge into blogging and video channeling; but the true stars are the geeks and weirdos that have turned professional.