Mad Men returns April 7th. NY Times

Google reached $50 billion in revenue last year. Mashable

Panasonic opens first retail store in North America. brandchannel

Pebble smartwatch begins shipping. Kickstarter

Facebook causes envy. Telegraph

How Google became a great place to work. Slate

Mozilla unveils open-source smartphone. Mozilla

Bitcoin casino makes huge profit. Wired UK

Facebook is the most used mobile app in the US. Mashable

40 public universities will offer free online courses. The Verge