A lot has been written about the frothy LinkedIn IPO in the last week and the investment bankers can't win either way but I believe in the end they are doing their job and making a market.On one end of the criticism you have Evan Newmark at the WSJ saying that IPO buyers are LinkedIn Stupidity. He wrote that "tonight’s IPO buyers need not worry. Common sense generally has little to do with the IPO market – and absolutely nothing to do with the LinkedIn IPO" and accuses Morgan Stanley [...]