We knew that changes were coming to link shortening service Bitly, and today the company has rolled out a major overhaul that gives the service a much more social feel. You can still shorten and share links as before — which Bitly now calls bitmarks — but now the site also recommends you links based on what your friends are sharing. The new network section of the site features a Twitter-style timeline of links that have been shared by your Twitter and Facebook friends who are also on Bitly, essentially creating a social news feed. Saved bitmarks can be organized into bundles and shared with friends, and you can give them names and notes to make them easier to find. You also have the option to make links either private or public.