The new profile page is the culmination of a series of launches over the past three months of a new homepage, notifications, endorsements and influencers products that has accelerated usage of the site, says Deep Nishar, senior vice president of products and user experience at LinkedIn.

FORBES: LinkedIn Revamps Profiles, Pushing More Everyday Site Use

With Timeline, Mr. Zuckerberg and senior executives decided to organize focus groups to better incorporate user feedback before pushing out the product, according to executives.

WSJ: Facebook's New R&D Machine

At our recent annual user conference, I caught up with another senior executive who told me about a new technique his company was using to motivate employees.

FORBES: Passion vs. Productivity

Far better for the criminal, said Paul King, senior security advisor for Cisco, is to use those phishing e-mails to exploit the end user.

BBC: RELATED BBC SITES

Russ Crupnick, senior vice president of industry analysis for NPD, said the competition isn't hurting Apple yet because the iTunes user base is so big.

WSJ: Eddy Cue: Apple's Rising Mr. Fix-It