Santa Monica-based Docstoc, the venture funded web-document sharing firm run by Jason Nazar, has connected the firm's document sharing service with Facebook and Twitter updates. The new features allow users to automatically post a link in the Facebook social networking site or the Twitter micro-blogging service with any upload or download of a document. The new features require users of Facebook to add a new application "Docstoc Updates" to their profile; the Twitter connectivity uses the newly launched OAuth interface for Twitter. Docstoc is venture backed by Rustic Canyon Partners, along with local angel investors.