The event was a great success, with a rather large number of attendees, including people coming from abroad such as Debian kernel maintainers Ben Hutchings and Maximilian Attems, who talked about their work with Linux.
Among the other speakers were Loïc Dachary about OpenStack and its packaging in Debian, and Josselin Mouette about his work deploying Debian/GNOME desktops in a large enterprise environment at EDF R&D.
On my part I gave a talk on Saturday about Debian's release team, and the current state of the wheezy (to-be Debian 7.0) release.
On Sunday I presented together with Vladimir Daric the work we did to migrate a computation cluster from Red Hat to Debian. Attendees had quite a few questions about our use of ZFS on Linux for storage, and salt for configuration management and deployment.
Now looking forward to next summer's DebConf13 in Switzerland, and hopefully next year's edition of the Paris event.