VentureBeat writes, When the social news tool Digg relaunches next week — Wednesday to be exact — it will get help from a new product called Realtime, a search engine that surfaces links being shared the most across the Web. Realtime is owned by Bitly, the URL shortening company with the biggest market share. Bitly has long worked to offer useful analytics around the vast troves of data it collects from the links people are sharing with its service. And with its Realtime, which launched today (TheNextWeb appears to have seen it first), Bitly is bringing a version of that offering to users for free...