Facebook just revealed its Kryptonite: mobile

gigaom.com — In its IPO filing Facebook mentioned the word "mobile" 123 times, but didn't use the term in positive ways. In fact, Facebook’s S-1 filing is one big warning to investors: its growth is being driven by user behavior that it has so far failed to monetize. Feb 2, 2012 View in Crawl 4

Facebook just revealed its Kryptonite: mobile