Many of the questions being asked might be answered on the Guiding Principles page:http://secularbuddhistassociation.com/a ... rinciples/
In essence, we are following the eightfold path, and are finding ways to engage with the teaching and practice that may resonate with contemporary culture. For many of us, that is a non religious approach in which assertions require evidence in order to allow a common point of reference. We're perfectly willing to accept rebirth, but as we also question the assertions of other religious traditions about what happens after death of the body, we equally should question our own in the spirit of sincere, honest, free inquiry.
Please note, it is not in any way a denial of traditional practices -- most of us come from traditional, religious settings. We simply find pragmatic application of the Buddha's teaching can be done quite well, providing beneficial transformation in how we release the causes of suffering, without an adherence to ideas from a cultural context not our own.
Thanks for the discussion, this is wonderful to see lively talk and sharing!