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Thousands of small merchants depend on Amazon.com to reach customers who otherwise wouldn't know they exist. But some complain that Amazon itself often spots their popular products and then starts muscling in.

Zynga announced plans to offer a central hub to connect players of multiple games who use various devices.

An array of surveillance software now exists to let parents keep tabs on their children’s activities online, raising questions about appropriate parenting.

Facebook has changed your email address. At least that's how many felt after a quiet but vast change in the way the company displays users' contact information. Facebook replaced the email address users chose when they signed up and changed it to a facebook.com address. The Facebook email accounts allow users to communicate with outside email addresses via Facebook.

Over the weekend, Facebook added a stalkerish feature called "Find Friends Nearby" to its mobile website; on Monday, it was gone. "Find Friends Nearby" let users of iOS and Android devices locate BFFs — and perhaps nBFFs (never BFFS) — who were within range.

Microsoft agreed to buy online social network firm Yammer for $1.2 billion in cash, which will allow the software company to offer a service like Facebook's to corporate customers.

Apple's patent case against Google's Motorola Mobility unit in Chicago was dismissed on Friday with prejudice, keeping both parties from refiling claims against one another.

A federal judge in Chicago, Ill. has thrown the Apple-Motorola Mobility smartphone patent case out the courtroom window and locked the window behind it, making sure it never finds its way back inside his court.

Facebook said it has begun placing ads on Zynga's website, another move by the social network to add revenue sources on the heels of its flawed IPO.