Here’s a few general mediation sites, from British Columbia, and elsewhere, that I recommend:
BC Dispute Resolution Office – Official BC Government site for mediation and dispute resolution in general.
Guide to Mediation in BC – Guide published by the BC Dispute Resolution Office.
Mediate BC – A not-for-profit society, formed in 1998, that provides dispute resolution (DR) services in B.C, and to whom I contract as a court mediator.
Mediate.com – This is the number one one portal for mediators, and all things mediation-related. Lots of great articles here.
ADRHub.com – A community-of-practice site for mediators.
ODR World – A good portal for information about Online Dispute Resolution. Maintained by MIT in the eastern U.S.