HOW TO GET RICH IN EUROPEAN TECH? Marc, Oliver, and Alexander Samwer are near-legendary in Europe as entrepreneurs and investors. What do they do? They clone American startups. They do it fast, they do it well, and they cash out. Among the companies they’ve cloned are eBay, Facebook and Groupon — and they’ve had successful exits for all of those. And they don’t just build European copycats of US startups anymore — they also invest in US startups that want to expand in Europe, like LinkedIn and Facebook. They found an excuse to interview the Valley’s elite: a senior...

We dug through recent and late tech bubble stars and found some truly impressive young founders.   A handful sold their companies for $100 million or more before the age of the 30. Others took their companies public — also before the age of 30. Check out 13 founders under 30 who grew their companies to $100 million+ exits >>      

Many of the world’s most valuable startups haven’t been around for very long.   Some companies with $100 million+ valuations were founded just this year. Others have been around, but didn’t receive any traction until a few months ago. We compared this year’s Digital 100 list to last year’s and found the most valuable new additions. Read...

Let’s look at some of the founders behind those companies. Some are incredibly young. One 25-year-old has built an $800-million-dollar business. And, by the way, say what you will about reality star Kim Kardashian, but don’t forget: she also has $250 million startup. www.businessinsider.com/young-successful-entrepreneur-world-digital-100-2011-9?op=1    

Aaron Levie is unusual for a 26-year-old CEO—he’s much more excited about business software than consumer products like Foursquare. Levie founded Box.net, an online service for sharing and collaborating on documents and other files, in 2005. About three years in, he looked at the company and saw a split between consumers and business users. He realized he would have to choose one or the other, and banked on enterprises. It turned out to be the right move: Box.net has made the turn from being used by individuals and small departments to selling directly to CIOs, and is winning contracts...