SAN FRANCISCO (Reuters) - Online survey company SurveyMonkey said on Thursday it has started an $800 million recapitalization that will allow it to cash out early shareholders and investors. The financing underscores a trend in Silicon Valley to delay initial public offerings long beyond the time a company reaches revenue and profitability benchmarks that would have made it an IPO shoo-in in years past. "We're not saying we're never going public," said Dave Goldberg, chief executive of SurveyMonkey, an online survey company. ...