During the Open Source Developers' Conference 2013 (Open World Forum 2013) event, I give a talk Introduction aux Software Collections.
I think the subject have interested the attendees, and I can discuss and answer various questions about SCL on the Fedora and Red Hat stands.
Presentation slides (English) are available: Software Collections Introduction
I think the live demo running a RHEL-6 server with an Apache 2.4 front-end and 3 FPM services as back-end (PHP 5.3, 5.4 et 5.5) was a good example to prove SCL usability, utility and simplicity.
The talk was filmed and I will post the video link as soon as possible.