Hi Tim,
That is where we build the debs from. In one of our next rounds of upgrades we hope to provide the sources via apt-get source on packages.ros.org. But I suggest pulling from the git-buildpackage repos as that will be easiest, and you can keep your own fork of the repo if you want for your architecture specific sources.
Tully
PS: For reference all the new style debians in fuerte they are listed at : https://github.com/ros/rosdistro/blob/master/releases/fuerte.yaml