At any times not listed below, Jörn is likely in Hamburg, Germany.
2008:
Feb 22-28 San Jose, California, http://www.usenix.org/events/lsf08/index.html
Apr 15-17 Mountain View, California, http://www.embeddedlinuxconference.com/
May 28-31 Berlin, Germany, http://www.linuxtag.org/2008/
Jun 13-14 Bad Bederkesa, Germany, http://www.nigrock.de/
Oct 7-10 Hamburg, Germany, http://www.linux-kongress.org/2008/
Oct 25-26 Eindhoven, Netherlands, http://www.t-dose.org/
Nov 6-7 Ede, Netherlands, http://www.embeddedlinuxconference.com/elc_europe08/index.html