Lars,
I was referring to external authentication, but stand corrected. I was under the impression that most of the development of the actual code (I have been following the specs & design documents) was going on internal to collaboraid, and then commited as a whole to the main tree.
I probably came to this conclusion because I was developing on the 4-6 branch (in anticipation of 4.6.4), which was abandoned.
I suppose I just started this work at the wrong time and place.