Binary package “screenbin” in ubuntu disco

use Amazon EC2 to host a shared screen session

 screenbin uses Amazon's EC2 cloud to dynamically instantiate an Ubuntu
 instance in the cloud, install a specified list of ssh keys, and launch a
 shared screen session as a guest user. In this manner, screenbin is a
 collaborative tool like pastebin, or gobby, but provides a shared shell
 environment.
 .
 This is particularly useful for synchronous code reviews, education,
 collaborative debugging, and demonstrations when a shared terminal
 between two or more people is required.
 .
 Amazon EC2 provides a central location accessible via ssh by all parties,
 such that no individual needs to modify local firewall settings to allow
 incoming ssh access. And the 'throw-away' nature of EC2 instances
 allows the host to immediately destroy the instance should anything
 go wrong.