1) Open source has nothing to do with it, try a definition next time. Second, if you ever used it, you would know you authorize contacts, same as MSN.
2) Getting full-featured MSN on anything but Windows is nearly impossible.
2.2) But you can only access it if you are at your computer where the log is, and if the program you're using to access it happens to log your chats.
3) Yes you do,
supersuperdude@hotmail.com is not how I identify people
4) Can't leave voicemail though
5) Should've watched the video, you would've seen how it works. But it's a good thing you don't need to understand the point before trying to offer a counter-point thanks to
the internet.