We have been setting up the necessary infrastructure (such as this forum), and it look longer than anticipated, thus the delay. We also anticipate slower response in the next week, as large fraction of our team is at the XLDB4 conference and the SciDB Community Meeting, but after next week things should get much smoother.
I believe it will make contribution easier if we have a public repo available. Since I couldn't find one anywhere, I created a github public repo called SciDB-mirror at https://github.com/wujiang/SciDB-mirror