Amazon has launched it’s own shortened URL, amzn.to, powered by bit.ly’s new Pro service. Twitter’s default (for now) URL shortener has 6,000 corporate clients, including Amazon. The online retailer joins other corporations like nyti.ms (NYTimes), huff.to (Huffington Post), on.cnn.com (CNN) and yes, tcrn.ch (Techcrunch). Last year, the company rolled out it’s own truncated URL (internally created)