Online Ad Market:

• Google's AdMob reaches 2 billion daily ad requests.

• Greystripe’s flashy iOS ads help boost mobile ad network’s revenue by 400 percent.

Business News:

• Facebook sets stage for IPO next year.

• Gartner says worldwide IT spending to grow 5.1 percent in 2011.

• Mac App Store tops 1 million downloads on day one.

Security:

• To fight spam, Google Apps adds e-mail signing.

• Without proper code validation, Mac App Store downloads are easily bootlegged.

Gaming:

• Microsoft: we won't abandon core gamers.

Pearls of Wisdom:

• Should ads be allowed in schools?

• Ask an Expert: better to use Facebook ads, or Google?