Hunter Beaumont, PhD.: It's getting more difficult to  contact me personally every year. That's a side-effect of progress as far as I'm concerned, since I'm spending more time writing and doing other private-life sorts of things.

The best way is E-mail:

If that doesn't work, try the old fashioned post: Baaderstr. 84, 80469 München, Germany

If you are looking for a practitioner in your local area, the best resources are: 

the homepage of the Deutsche Gesellschaft für Systemlösungen (DGƒS for short) http://www.iag-systemische-loesungen.de, 

the ISCA homepage http://www.isca-network.org.