I think moving to github is absolutely worth considering. But what kind of infrastructure is wanted in the future is really a question for Behe, Decay & Floris to decide amongst themselves. I won't want to change it before I retire. I do feel like there are now many people interested in BA who would be able contribute and work well together, and github is undoubtedly the best platform for collaborative work.thoughts about migrating to Github now? ... increasing the contributability and visibility of the project is something worth considering
As a side note, for LD I used TortoiseSVN to commit to github. It is possible to use the github-svn bridge and integrate seemlessly with TortoiseSVN, which makes github use much more appealing for people who are Windows users and hobby programmers with no desire to navigate git. You have to use soft links to get the checked out repo to appear as a .sdd, but there is a neat tool for this (with a gui), also there is the minor annoyance that submodules don't work with the svn-github bridge (branches do work). I'll probably write a wiki page with clear instructions on how to do it at some point.