After having been to the OSGi developers world conference in 2005, where I presented the dependency manager that is now part of Apache Felix, in 2008 Karl Pauls and I are back at OSGiCon which has since merged with EclipseCon and has become quite a big event.
Hosted in Santa Clara, California, the event lasts for four days and whilst a lot of content is somehow related to Eclipse, there are a lot of interesting talks and workshops about OSGi in general. In fact, on the first day, Karl and I did a workshop on building secure OSGi applications as part of that OSGi track.