Be concerned with quality of information issues. These groups are growing and have become very popular. To find discussion groups on various topics, try Liszt, the mailing list directory . These portal sites may, or may not, have selection criteria, like currency and reliability, for including a link to a Web resource. You must check and find out what a prticular portal is using as a basis for including a link to another site.
Materials involving spirituality can be difficult to evaluate clearly.
This may require writing to authors to ask about the materials they used. Searching the World Wide Web can be complicated. It is very difficult to find materials in languages other than English and Spanish. However, some information is available. Their materials are not yet on the web, but they have prepared brochures and other materials for their meeting and workshops.