Online Ad Market:

• Why is it taking so long to get an ad on iAd?

Measurement & Analytics:

• Measuring audience engagement with social media.

Biz Buzz:

• Elevation Partners increases Facebook stake.

• GetJar, the anti-Apple app store, raises $11 million.

E-mail Marketing:

• Opt-in versus Opt-out - what is fair and what is legal?

• An Uncommonly Good e-mail approach of leveraging ratings and reviews.

Social Media:

• Popular Foursquare program prompts antisocial marketing.

• Loopt knows where you are - and tells everyone.

Search:

• Google Vs China - search giant blinks.

Pearls of Wisdom:

• 10 mistakes companies make with social networking sites.

• What else can I test to increase e-mail click throughs?