Online Ad Market:

• Do economics of real-time search ads work out?

• Old ads that won't die or fade away.

Convergence:

• A dozen national broadcasters align to create mobile TV network.

Social Media:

• Facebook currently testing new "questions" product.

• 8 brand personalities Facebook and Twitter users hate.

• Value of a fan on social media: $3.60.

• McDonald's names first social media chief.

Search:

• Paid search market enjoys a health start to the year.

• Google adds real-time Twitter archive search.

Mobile Computing:

• Google, Microsoft prepping iPad rivals.

Smartphones:

• Nokia knows social-networked phones too.

Productivity:

• Google unveils souped-up Google Docs for corporate use.

Security:

• Facebook retools its safety info center.

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