Ecommerce:

• Big sales jump for 'Cyber Monday'.

• Online shopping can distract during work.

• Google Music's version of Cyber Monday: $1.99 albums.

• PayPal Cyber Monday mobile payment volume up over 500 percent.

Mobile Computing:

• Google, Apple still haven't embraced CTIA's mobile app rating system for sex, violence.

• Apple gives developers an early taste of iOS 5.1.

• It’s still a feature phone world: global smartphone penetration at 27%.

• RIM BlackBerry services open up to iOS, Android.

• Google Catalogs comes to Android tablets.

Finance:

• Facebook may do an IPO in the second quarter.

• Silver Lake consortium is said to seek Yahoo stake.

Security:

• Twitter acquires Whisper Systems, security boost on the way?