Everyone says we're in the midst of another bubble. But there are signs that Silicon Valley has learned a bit since the tech crash of 2001. The knee-jerk reaction to IPO fever sweeping Silicon Valley is that we're in the midst of a new tech bubble. There is, after all, plenty of stupid money flowing all too fast. But there are some signs that this bubble might not be like the last, and this infographic by Column Five for Focus offers some tantalizing data points.