They are independent tools, despite being built off a common code base. So there is actually very little overlap between the BioFabric and BioTapestry user experience, and the existing BioTapestry documentation is unfortunately not going to be any help. The BMC paper is the best way to get an intro, along with asking questions in this group (note the BMC final PDF should be ready in a week). I would love to have tutorials ready to go, but don't have the resources at this point. My suggestion is to build a SIF file, import it in, play with the software, and ask me lots of questions in this forum.
Thanks for your question and your interest in BioFabric!
Bill