Roger Ebert has died of complications of cancer at age 70.

He was the film critic of the Chicago Sun-Times since 1967 and his reviews were syndicated in more than 200 newspapers around the world.

He also wrote more than 15 books, including several best sellers, and was known for his TV shows.

Editor's Note: At a media event Thursday, Facebook unveiled new software called 'Home' that will be deeply integrated with Google's Android operating system.

The social giant also announced the HTC First, which is the first mobile device that will come pre-installed with Facebook's new Home software.

The new software will be available for download on April 12 in the Google Play Store and the HTC First phone will go on sale the same day at AT&T stores in the U.S. The phone will retail at $99.99.

CNBC covered the event live, scroll down to read more about Facebook's new 'Home' applications below.

The Securities and Exchange Commission is moving into the 21st century with its announcement that companies can use social media to communicate important information.

The SEC "confirms that Regulation Fair Disclosure applies to social media and other emerging means of communication." The key thing: Companies just need to alert investors "which social media will be used to disseminate such information."

What's the upshot of this news?

Shares of Nuance Communication closed almost 6 percent higher on Tuesday after activist investor Carl Icahn disclosed a 9.27 percent passive stake in the software company.

Most consumers may never have heard of Nuance, but its software has likely heard their voice. It's the leader in speech recognition technology, powering everything from Apple's Siri to banks' customer service calls.

Just Monday, Nuance announced a big move into voice activated ads that talk back. The company is partnering with ad agencies, ad networks and publishers to tackle the $8 billion-plus mobile ad market, with the goal of making them more engaging and effective.

On Thursday, Facebook is hosting a big event to unveil its "new home on Android."

What does that mean? We expect to see a new Facebook operating system for Google's Android phone, which the social network will showcase on an HTC handset. Sources said it will effectively give users the option of making Facebook your phone's home screen of sorts.

It makes sense that Facebook is doubling down on mobile: It wants users to spend more time not just with its core social network, but also with its other mobile services, including texting, voice calling, and email. And though it hasn't launched Graph Search yet on mobile devices, it will eventually, and that'll provide another mobile revenue opportunity.

Facebook shares have been hammered by concerns that its ads are becoming less social—and less effective. But just a day after Facebook shares hit a low for the year, they rebounded on Wednesday, boosted by a couple different pieces of news.

Here are three factors driving the stock higher.

CBS announced on Tuesday it is buying a 50 percent stake in TV Guide Network from One Equity Partners, entering into a joint venture with Lionsgate to run the basic cable channel and website.

The deal is small, but it has potentially big implications for CBS.

No price tag was announced but sources said it was in the ballpark of $100 million to $120 million dollars.

However, it gives CBS an entertainment network—a place to potentially distribute its shows and showcase its entertainment expertise. It also expands CBS' footprint into the lucrative cable space.

(Read More: CBS' Moonves Talks 'Transformation' With Digital and Ad Growth)

Facebook shares are down more than 20 percent since hitting a six-month high of $32.51 on Jan. 28. Just two days later, the company reported earnings that beat on the top and bottom line. So what's behind the slide?

It's largely due to growing concerns that Facebook ads aren't working well, concerns spearheaded by BTIG analyst Rich Greenfield. He says Facebook has shifted from truly social ads to more "spammy" ones. "It's concerning that they'd be struggling to grow revenues fast enough that they use ads that don't align with their original mission," he said.

The pressure is on for DreamWorks Animation this weekend to have a big hit with the release of "The Croods."

After "Rise of the Guardians" bombed at the box office, the studio had to take an $87 million write-down, and lay off 350 employees.

DreamWorks needs a success to show it has what it takes to lure in family audiences in an increasingly competitive environment. And with the successful "Shrek" franchise behind it, it could use the kind of hit that creates a massive brand and spawns sequels.

We know that over a billion people spend virtually infinite time on Facebook and Twitter, and much of that time is talking about, and interacting with brands. But what does all that time mean for advertisers? Some new studies reveal the real impact—or lack thereof—of various types of social interactions.