It's interesting how some internet startup concepts seem to keep coming back. Website building tools have gone through a number of generations, but are still relevant now. Similarly Facebook was the second wave of social networking sites. I recently saw a "pets.com" clone launching in South Africa (they got funding from Google's local seed fund)!

Marc Andreessen's aggressive stance is that the dot.com bubble was basically a "mistake". If that's correct, how would one decide that an "old" idea's time has come?

http://blogs.wsj.com/venturecapital/2012/11/01/marc-andreess...