Online Ad Market:

• Facebook ads surge despite lag in ROI.

• WPP's digital salary splurge.

• WPP buys Brazilian digital agency Grïngo.

Ecommerce:

• Amazon may soon need to collect sales tax.

Cloud Services:

• Apple paid $100+ million to labels for iCloud rights.

Security:

• Yahoo and Hotmail are also targeted by spear phishing hackers.

• Hacker attacks threaten to dampen cloud computing's prospects.

Mobile Computing:

• Windows 8: what you need to know.

• Adobe CEO: Android tablets will beat iPads.

Productivity:

• Google Apps phases out older IE, Firefox, Safari versions.

• Google expects 1% of requests to fail on IPv6 day.

Gaming:

• Nintendo 3DS update adding eShop, web browser.

Business:

• Groupon to gauge limits of IPO mania.