Social Media:

• Analysis: Facebook video calling versus Google+ Hangouts.

• Who owns your social graph — you or Facebook?

• Over 500,000 businesses are on foursquare.

• One week in, Google+ users are growing followers, getting traffic.

Mobile Computing:

• Motorola Droid 3 debuts today.

• Apple App Store downloads top 15 billion.

Privacy:

• Smartphone apps: Is your privacy protected?

Security:

• Post’s jobs section hacked, exposing 1.6 million user IDs, e-mail addresses.

• Malware exploit found for iOS devices by German researchers.

• Apple vows to fix security hole in iPhones, iPads.

Infrastructure:

• Facebook will build more data centers.