Skype, my favorite (and only production grade) IM and VoIP client, passed a 10 million concurrent users today. They will also integrate significantly with social networking giant Myspace (110 million users). That will have a huge impact. They will share/connect IM, presence and voice, starting mid-November. If you’re a MySpace user, you might want to create a Skype account with the same name (if not taken). I do urge you to stay on using Skype2Skype communications, as that is end-to-end encrypted, meaning they what is private stays private.