Slides presented at Amoocon 2009, Rostock, Germany, are now available at:
http://sip-router.org/pub/events/2009-05-Amoocon/2009-amoocon-sip-router.org.pdf
The two day event, although Asterisk centric, brought many people from different projects and technologies around SIP and VoIP. Very interesting talks about integration with web and social networking, SS7 or database clustering.