LinkedIn’s recent IPO saw a spectacular doubling of the shares on the first day. They trade at a 45 multiple of their revenues with $12 million profits per year. That seems like a pretty steep valuation. See an interesting infographic on current valuations of the Tech Bubble 2.0 in the rise: Skype, Delicious, Facebook, Groupon, LinkedIn, Color, Twitter.
Infographic: Valuations in the Tech Bubble 2.0

Interestingly enough Marc Andreessen, inventor of the Netscape browser and now venture capitalist, yesterday denied we are seeing a technology bubble.
Personally I get the feeling of a déjà -vu: A bit more than ten years ago tech shares skyrocketed in similarly spectacular ways. What followed is history…