Mobile Computing:

• Barnes & Noble eyes Nook spin-off amid sales shortfall.

• Now it's a Google tablet that will challenge Kindle Fire?

• Verizon sees iPhone sales double to 4.2 million during holiday quarter.

Social Media:

• Facebook says most photos flagged by users aren’t actually offensive — just unattractive.

Business:

• Disney and Comcast link up for another 10 years.

Cloud Computing:

• IBM buys cloud-based software testing platform Green Hat.

Online Video:

• Netflix's 20M members streamed 2B hours in Q4 of 2011.

Financing:

• Embroiled in the Google sponsored-post debacle, Unruly raises $25M.

Research & Stats:

• Deloitte: 9% have cut cable, another 11% are considering it.

Global Business:

• All cellphones in Chile must be sold unlocked from January 2nd.