A year and a half after launching at our first TechCrunch40 conference, document-sharing service Docstoc is taking off its “beta” label with a homepage redesign, open APIs, and a new revenue-sharing model called DocCash. The service is growing at a healthy clip, with 3 million documents uploaded and 1.6 million unique visitors a month in the U.S., according to comScore. (The company’s internal Google Analytics shows 4.8 million unique visitors worldwide). Read More