Ad Buying & Planning:

• NBCU launches own digital ad network.

Mobile Marketing:

• Industry group to study how a mobile nation uses media.

Social Media:

• Calculating the cost of social media.

• How the rise of social media is closing the tech divide.

• Hotels look for the key to social media.

Gaming:

• Disney in talks to buy social game company Playdom.

• Will Zynga become the Google of games?

Smartphones:

• Blackberry's era may be ending.

• Motorola's Droid X - Google's ticket to success.

• OS 4 on half of all iPhones.