If it is a simple addon that you will just insert a http link where the file is located and then the client behaves like as giving the link and authority to other clients and stoping it when you want, then it would be cool. If it is like TorrentFlux where you should have dedicated servers and root access in order to install then it would suck. There must be a way that we should utilize the shared webhostings we have and their traffic/connection advantages for seeding!! Always using shared webhosting space/traffic!!!