Online Ad Market:

• Opinions vary about the validity of Yelp advertising.

Mobile Computing:

• Halliburton to ditch BlackBerrys in corporate transition to Apple's iOS platform.

• Smartphone shipments rose 61% worldwide in 2011, report says.

Social Media:

• Those millions on Facebook? Some may not actually visit.

Development:

• Google launches developer page.

• Still waiting for Google developer ecosystem though.

Security:

• Hackers wanted $50,000 to keep Symantec source code private.

Legal/Regulatory:

• SOPA and PIPA prompt Reddit, Mozilla, and 73 others to ask Congress to halt work on intellectual property laws.

Signs of What's To Come:

• HUD Google Glasses are real and they are coming soon.

• Google unveils 'secret lab' for radical ideas.