Pair Programming Screencast (ssh, screen, vim and skype)

[oreng]

I am planning to do a 10 minutes presentation about this topic.
Please watch my screencast and provide me any feedback/corrections you want.
http://www.youtube.com/watch?v=IFClpADY7Tc

Also I have the following questions:
1. What is the limit to the number of users connected to a screen session?
2. "multiplexes a physical terminal between several processes" - what does
multiplexes means in the context of Screen.
3. sudo chmod u+s /usr/bin/screen - only if there is a flaw in screen's
authentication, it might be a security risk.    Is this statement accurate? 
what exactly can happened?


Thanks,
Oren

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