Hi there!
Yesterday I wrote a little wrapper script to sort archlinuxarm's mirrorlist using rankmirrors utility!
It basically takes the mirrorlist, strips some useless comments and pushes it on to rankmirrors utility (from pacman-contrib package).
Afterwards it replaces Pacman's /etc/pacman.d/mirrorlist.
It can take the mirrorlist from /etc/pacman.d/mirrorlist, fetch the newest mirrorlist from pacman-mirrorlist sources or use a specified mirrorlist.
Here is the Repository: https://github.com/ViktorF/rankmirrors-arm
Hope you guys enjoy!