About a year ago, the blogosphere was all-a-twitter about a clever parody service named Flutter that shortened micro-blogging down to 26 characters. But now, in one of those funny twists of Web 2.0, we’re getting a real service named Flutter – but rather than shrinking Twitter messages even further, it simply tells you who from your social networks is physically close by. Launched by Mashed-In, Flutter connects with your Twitter, Facebook and Linked-In friends and, using geo-aware tech in mobile phones, lets you know whenever they check in or update something from nearby. While this naturally…