The best resource on BioSpirituality is: http://www.biospiritual.org. This is the BioSpiritual Institute’s resource site that contains a treasure trove of information about BioSpiritual Focusing, its flow and dynamics, educational program offerings and an extensive library of writings by Fathers Campbell and McMahon.
The Focusing Institute is also another excellent resource with links to current focusing educational programs and articles as well as a library that contains a wide variety of articles and publications on focusing: http://www.focusing.org.
Here are some video resources than might be useful in understanding BioSpiritual Focusing: