We've run into bandwidth problems due to too many people using ftp.archlinux.org instead of a proper mirror. ftp.archlinux.org has been throttled and will be much slower from now on. Please find a mirror to use instead.
rsync.archlinux.org has also experienced similar problems. Too many people (nearly 600, in fact) are using rsync to create full local mirrors when they probably have no need (I mean, c'mon, we had someone rsyncing through a gprs connection, use some common sense!). These unnecessary full mirrors are using up rsync slots and preventing our official mirrors from syncing in a timely manner. Thus, rsync.archlinux.org will soon be limited to official mirrors ONLY. If you still feel the need to mirror the entire repo, please use one of our official mirrors' rsync service instead. If you are running multiple Arch machines on a small LAN, then we suggest that you check out a solution like this one.