Trends:

• Ad Network CEO: celeb deaths of 2009 benefited some marketers.

Search:

• The science of managing search ads.

• Google unveils new tools for display advertisers on Content Network.

Social Media:

• Twitter at a crossroads: audience growth won't be enough in 2010.

• 5 free social monitoring tools discussed.

Web 2.0:

• PayPal vet Jack Selby launches digital film production, distribution and marketing firm.

Smartphone:

• Tap Tap app sales hit $1 million per month.

TV Everywhere:

• A proposal from Apple to offer online TV subscriptions stirs network interest.

Retail:

• Late-coming shipping promotions drive online shopping.

Legal/Regulatory:

• Comcast settles class-action suits over throttled traffic.

• Michael Jordan sues Jewel Food Stores and Dominick's Finer Foods over ads.

Security:

• New fb.59.to Facebook virus posts random images to your profile.

Productivity Apps:

• Court rules against Microsoft in Word patent suit.