I just came across oxwall today few minutes back and was interested in this instantly.
I have worked/working with ELGG and Wordpress/Buddypress. I have developed couple of free plugins for ELGG too.
I was looking for bug tracker and code repository links in the oxwall.org site. But I could not find any. I assume that the oxwall code is not in a code repository like Github or SVN.
Also why such a good software does not a dedicated bug reporting and tracking system?
Correct me if I did not look in the correct places for the links.
I can assist in setting them up if you guys want it. I can create them in my website too (iyaffle.com).
These are some of the steps that will take oxwall further.