Top-rated Internet analyst Mark Mahaney says there’s demand for Zynga, Facebook, LinkedIn, Twitter When the ducks are quacking. Feed them. It seems 2010 may be shaping up to be the start of an Internet IPO craze, as public-market investors begin to make noise about their interest in newly-minted shares. After a gloomy start to last year turned around and ended on an upbeat note – Google shares soared 102%, Amazon rose 162%, Expedia spiked 212% - it's not surprising that investors are craving for more momentum and upside.  "Facebook, in our Citi conference earlier this year was the single most-mentioned company,” said Mark Mahaney, Internet analyst at Citi Investment Research. “The buzz behind that [name] is similar to and reminds me of the buzz we heard and was built up around Google when ...   [ Read more ]