we successfully installed OpenMeetings on Amazon EC2. It worked out of the box without any huzzle. I think this is good news to a lot of people that would like to scale OpenMeetings for their needs.
Amazon offers already a lot of instances to install as operating system. We have been using one of the over 200 Debian operating systems that have been available.
I think the only important thing is … Never press the shutdown button in amazon (for example to save money) Cause as its a virtual machine all your data is gone!
You also need to check that you are installing OpenMeetings at a location where enough space is left.