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The most popular StumbleUpon links of 2011 (infographic)

What do Japan’s earthquakes and tsunami, the royal wedding, and the passing of Steve Jobs have in common? They were all hugely popular topics on StumbleUpon in 2011. The link discovery website had quite a year — in October it reached 20 million users, December brought a complete site redesign, and it now averages 1.2 billion “stumbles” per month.

Zillow

Zillow prices IPO, now has nearly $400M valuation

Online real estate company Zillow on Wednesday filed new SEC documents that declare its IPO pricing between $12 and $14 a share, which gives the company a $378 million valuation. The company intends to raise up to $55.7 million in the IPO.