GitHub is my pefered option. Otherwise you can contact me on Reddit, Facebook or Twitter. Please include the URL the bug occured on and as much information as possible. GitHub - Reddit - Facebook - Twitter
If a name is already taken by an account you can only obtain it via a name change. These names are shown with a green background. If a name isn't taken by a current user you can take it on a brand new account. These names are shown with a blue background.