Apple’s version of rsync on MacOS X has a documented-but-not-widely-appreciated “-E” flag.
-E, --extended-attributes Apple specific option to copy extended attributes, resource forks, and ACLs. Requires at least Mac OS X 10.4 or suitably patched rsync.
As in this (between old mac and new mac over an ethernet cable):
rsync -avE email@example.com:/Users/rs .
Hope this helps (probably me, later, when I google for it and find something I wrote myself).