First i think the plugin was removed from the repo, had a small problem with js, but i think is fine now, you can get the plugin from here http://omv-extras.org/testing/…avault-deluge_1.5_all.deb
The installation of deluge uses a combination of packages from wheezy and a ppa from ubuntu, this one specifically http://ppa.launchpad.net/delug…ibt/libtorrent-rasterbar/ for libtorrent.
I don't see any arm arch there available. So i am pretty sure it won't work for ARM
@jhmiller can have a better answer.