Pinterest grew 52% to 17.8M unique visitors in February

Love was most certainly in the air for digital inspiration board site Pinterest during the month of February.

The newly crowned princess of the Internet was the object of everyone’s attention and saw more than 17.8 million unique visitors in …

Lumosity sees brain games taking off as 20 million sign up for mental gymnastics

Lumosity released impressive growth numbers for its online brain training games. The company has added 6 million additional members since June 2011 for a total of 20 million registered users.

Speaking to VentureBeat, Lumosity chief executive Kunal Sarkar disclosed that …

E-readers post surprisingly robust gains, tablet growth slower

After the iPad debuted last year, some people predicted e-readers would fade away, becoming at best niche products. But a report from the Pew Internet Project Monday shows a different trend: E-readers like Barnes & Noble’s Nook and Amazon’s Kindle …

GSV’s small stake in Facebook leads to $70B valuation

GSV Capital Corp. has invested a stake in Facebook that values the social network at $70 billion, reports Reuters.

In an official statement Monday, Woodside, California-based GSV Capital said it purchased 225,000 shares in Facebook for a total of $6.6 …

The video game violence arguments that mattered to the Supreme Court

Here’s a breakdown of the arguments that mattered to the Supreme Court in its decision today to strike down California’s law banning the sale of violent video games to minors. The court voted 7-2 in favor of holding the law …

Soluto raises $10.5 million for anti-frustration crusade

Soluto, winner of TechCrunch Disrupt New York 2010, has raised $10.5 million in a second round funding from Index Ventures. The company’s software specializes in the tangibly intangible: anti-frustration.

The free software detects the nerve pumping in your forehead by …

HP launches TouchPad-exclusive magazine to promote webOS

Hewlett-Packard is getting into the magazine business!

Er… sort of.

The hardware giant is preparing to launch Pivot, a monthly digital publication exclusively offered on its forthcoming TouchPad tablet. Rather than running pure advertorial, the hybrid magazine/app guide will offer …

Biofuel producer KiOR sets IPO price at $15

Biofuel producer KiOR has priced its initial public offering at $15 per share, down from $19 to $21 that the company originally announced on Wednesday.

A lot of media and Web 2.0 companies filing to go public, such as LinkedIn …