As long as it is non-copyrighted material, I do not see a problem with this, the same as any file distribution method you may use on your site. If you are the copyright holder, go ahead, as far as I understand, a server of bittorrent files incurs relatively little bandwidth as compared to the actual seeders/leechers of said files. WestHost does reserve the right the refuse this type of service in the future, but as it has not been a problem up to now, it will probably be ok.