SAN FRANCISCO (Reuters) - Online company SurveyMonkey said it aims to raise $800 million in a late-stage venture capital financing, one of the largest such deals in the Internet sector that underscores how many Silicon Valley firms are no longer in a rush to go public. A listing was once seen as the pinnacle of success for an entrepreneur. But many firms reaching revenue and profitability benchmarks that would make them an IPO shoo-in can now tap the growing availability of late-stage cash and have also likely been put off by recent botched offerings. ...