Rennhack,
Doen Nukeworker.com list a calendar of upcoming events like this? There are some companies I would be interested in talking face to face with at a convention of this sort. But it would be hard to schedule unless I knew some time in advance, what with work and all.
BTW Some of the seminars I attend have certain times of year they run but dont confirm actual dates until much closer to that time of year. I imagine this may be the case too. Let me know what you know, and anyone can feel free to reply to this.