Financially struggling Sirius XM Radio Inc. is planning to stream its subscription radio service to the iPhone and iPod Touch devices from Apple Inc. beginning this spring.

After narrowly avoiding a filing for bankruptcy protection last month, the nation’s only satellite radio provider wants to step up sales directly to consumers. New car purchases - which had been Sirius’ best source of customers - are way down.

Sirius XM also said in a call Thursday to discuss its fourth-quarter earnings that it’s ramping up efforts to reach buyers of used cars with factory-installed satellite radios.

“We’ve been testing a number of initiatives to make the Sirius XM content and experience more ubiquitous,” said Jim Meyer, president of operations and sales at New York-based Sirius.

Sirius now has 19 million subscribers, up 10 percent from a year earlier.

By streaming its music, sports and talk channels to users of the iPhone and iPod Touch, Sirius can give its existing subscribers another way to access content and let new customers sign up without buying new radios, CEO Mel Karmazin said.

Google Inc will begin to aim online ads at people based on their Web browsing history, joining an industry trend that has raised privacy concerns even as it makes product pitches more effective.

The new program, dubbed “interest based” advertising, is being rolled out on a test basis across Google’s network of partner websites and on its video-sharing site YouTube, according to an announcement on Google’s blog on Wednesday.

The move comes a few weeks after the Web search leader’s smaller rival, Yahoo Inc, unveiled its own advertising enhancements, which rely on an individual’s online activity.

While behavioral ad techniques have been around for several years, some past efforts have raised privacy concerns, and Google has refrained from offering such advertising until now.

Apple introduced a smaller version of its popular iPod Shuffle music player on Wednesday with a new feature that tells the user what song is playing.

The new 4-gigabyte gadget costs $79, is half the size of the previous Shuffle, and carries up to 1,000 songs — twice as many as the last generation of the device.

All of the controls on the new Shuffle have been moved from the device to the earphone cord. The new VoiceOver feature announces songs and playlists to users in 14 different languages, according to Apple, whose shares rose 4.5 percent.

The voice function is particularly useful on the Shuffle, which does not have a display screen like most iPods or other digital music players.

Google Inc is seeking to blur the line between the telephone and the computer even further with the introduction of Google Voice on Thursday.

The new service weaves traditional phone features with Google’s Gmail email product, allowing a person to store transcripts of voicemail phone messages in their email inbox and to find a specific nugget of information within a phone message as if trawling through a sea of emails.

The move comes as Google increasingly branches out from its stronghold in Internet search, as it seeks to carve out a role in everything from cell phones to personal productivity software.

And it demonstrates the company’s ability to fuse various technologies — home-grown and acquired — into new products, even as the economic recession puts the future of certain Google projects in question.

Google Voice is based on the technology of Grand Central Communications, a company that Google acquired in July 2007. After Grand Central remained silent for nearly two years under the Google flag, some observers wondered whether it had met the same fate as Dodgeball, a Google acquisition that was formally shut down this year.

Google Voice, which will be available to existing Grand Central users on Thursday and to the general public in the following weeks, provides another reason for people to spend more time on Google’s various online properties, which benefits the company.