Mil Arcega of voanews.com writes:

Facebook is going public. The world’s largest social media network filed documents late Wednesday for its much anticipated initial public offering (IPO). Analysts say the initial offer will raise about $5 billion in the first go around, making it one of the biggest in recent history. We take a look at how much the company is worth and what that could mean for investors.

The giffgaff virtual mobile network operation, which runs on O2’s UK network, has introduced BlackBerry services today.

There’s now a ‘goodybag’ tariff option that enables customers to use a full range of BlackBerry services, including BlackBerry Messenger and ‘push’ email, for an additional £3 per month.

Sony Corporation has announced that Kazuo Hirai will become the company’s President and Chief Executive Officer from 1st April 2012. The appointment has been rumoured for several weeks.

Sir Howard Stringer, who currently holds the roles of company Chairman, CEO and President, will become Chairman of the Board of Directors in June. He’ll replace Yotaro Kobayashi, who is retiring.

Everything Everywhere has announced it’ll be running multi-million pound marketing campaigns for the T-Mobile and Orange brands from this week. Each is expected to run throughout 2012, demonstrating the differences between the brands.

T-Mobile will be positioned as a brand for value, with Orange as a brand that gives customers more.

Easy-to-use mobile phone manufacturer Doro says it’s moving beyond handsets to offer Android and Windows-based applications and services.

‘Doro Experience’, which will be demonstrated at Mobile World Congress in Barcelona later this month, combines a simple user interface and a selection of applications.