PRIVCO - May 4 - Facebook just amended its S-1 including initial price range of $28-$35/share, which is legally required in order form Facebook to begin marketing the offering to investors in person. The move indicates the final step before Facebook's IPO roadshow which is expected to begin on Monday morning May 7, 2012. Mark Zuckerberg will be ringing the opening bell at the NASDAQ MarketSite in New York’s Times Square on Friday, May 18th. The initial price range gives Facebook a final valuation between $70.4B to $88B. The final share valuation could be adjusted by as much as $5 above the high-end range in a final S-1 amendment in the days before trade begins, with an ultimate target valuation of $95.5-100.5 billion.