Biochar Discussion Groups
There is an existing biochar discussion group at http://tech.groups.yahoo.com/group/biochar/
You can subscribe to the Yahoo group by going to the URL shown above.
There is also a newly formed Google group at http://groups.google.com/group/biochar.
If you have a Gmail account, you can subscribe to the Google group by logging into your account and going to http://groups.google.com/group/biochar. Click the "Join this group" link on the right-hand side of the page under "About this group."