For all the Facebook IPO fallout, companies with “social” in their slide deck can still get attention or raise money. The Canadian reader/writer community Wattpad announced it has raised a $17.3 million round from a group of investors including Khosla Ventures, Union Square Ventures and Yahoo co-founder Jerry Yang. It aims to be the Yahoo of fan fiction. I dunno, but other than jokes, is there a demonstrable market for short-form, mostly user-generated fiction? Meanwhile, RebelMouse, the until-now secretive startup from HuffPo’s former CTO is showing hints of its invitation-only social publishing platform. It has elements of Tumblr and About.me, so users can post and aggregate their Twitter and Facebook content, and a business model that supports premium hosting and, potentially, e-commerce. Finally, I agree with Ryan Kim that Airtime seems to be missing a killer hook. A lack of nudity scanning isn’t what kept Chatroulette from reaching critical mass.