The key difference, however, is that you can add a 401(k) allowing employee contributions to a profit-sharing plan, but not to a SEP.

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Greg Koltermann successfully lobbied the printing company he works for to add a Roth 401(k) -- and signed up immediately, drawn by the prospect of tax-free growth.

WSJ: What's So Wrong With Roth 401(k) Plans?

In December Merrill Lynch and HSBC launched the research portion of a joint online asset management service in the U.K. The joint venture plans to add the transactional portion this spring and then expand into continental Europe.

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K. Shin, Samsung's mobile president, says the company will add another phone, called the Infuse 4G, to its Galaxy S lineup.

CNN: AT&T outlines plans for 4G network, phones

Later in the year, Zeebox will add remote control capability, something it has had in the U.K. with its partner, BSkyB, since its launch in November 2011.

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