the opensuse-hotstuff-160gb rsync module now contains the new factory tree. The module is available both on stage.opensuse.org as well as rsync.opensuse.org.
This adds 26G to the module, and the current total size is 120G.
It is right now the simplest option to sync factory. In addition, it contains openSUSE 11.0, all updates, and the most popular repositories.
A push or triggered sync mechanism is still planned though.