I've been playing around with setting up my own jenkins instance to build debs for ARM on my home system, and I've been able to build the catkin debs up through the ros_comm and geometry stacks (170+ packages total). The changes to the build script are pretty minimal; just updating a few of the apt-get calls so that they deal with arm properly.
I've submitted a pull request:
https://github.com/willowgarage/catkin-debs/pull/84/filesTully, how hard would it be to pull that and get the build farm started on debs for ARM?
Thanks,
-Austin