Exploiting weaknesses in online ad systems is an increasingly common approach for computer criminals around the globe who hope to make a quick buck from the audiences of the sites they attack.

The dream of quitting the day job and making a living from blog revenue has proved to be far-fetched for most bloggers. But a few entrepreneurs have found success in blog networks.

YouTube, the world's most popular video sharing site, said Tuesday it will start sharing advertising cash with users who upload the most popular clips of everything from skateboarding dogs to dancing babies.

President Obama said Sunday he's confident his drive to overhaul health care will succeed. The president writes in Sunday's New York Times about "health insurance reform" and says his attempt to overhaul the system is closer to reality "than we have ever been."

Media giant CBS beat the Street when it reported earnings of 8 cents a share last week, but its net profit is down more than 90 percent on the year. So why have CBS shares skyrocketed?

The early days of iPhone applications resemble the early days of the Internet. Media companies know they need to have an app for the iPhone, and so they are creating appealing ones that are loaded with features.  Yet, as with the Web, it is far from clear how much revenue media apps for the iPhone can produce.

Just as newspapers have begun to sell ads on the front pages of sections, magazines are selling space on or inside front covers.

French advertising company Publicis Groupe SA has agreed to buy Microsoft Corp.'s digital advertising firm Razorfish as part of an effort to boost its share of advertising on the Web, according to a joint statement released Sunday.

The new head of the Bureau of Consumer Protection at the Federal Trade Commission, David C. Vladeck, says it is time for that to change. In an interview, Mr. Vladeck outlined plans that could upset the online advertising ecosystem.

For all the concern and uproar over online privacy, marketers and data companies have always known much more about consumers’ offline lives, like income, credit score, home ownership, even what car they drive and whether they have a hunting license. Recently, some of these companies have started connecting this mountain of information to consumers’ browsers.

Walt Disney reported lower quarterly earnings that topped analysts' forecasts, but the company's shares declined in extended trading as its revenue missed predictions.

Peter Smith was browsing Facebook a couple of weeks ago when he stumbled upon an ad for hot singles. That's not unusual on social networking sites like Facebook, but what was unusual was the picture of the woman in the ad. It was his wife, Cheryl.

Harry and Louise have changed their minds about health care reform. The fictional suburban couple featured in a series of national television spots sponsored by the health insurance industry in 1993 and 1994 stoked fears that helped doom a government-created health plan promoted by a Democratic president, Bill Clinton.

Two congressmen who are tackling the new healthcare legislation don't want to go too far in implementing potential solutions, however.

There’s no shortage of companies turning to Twitter and other social media websites to promote their brands. But the trend hasn't created many new jobs—at least not yet.