Linux: Headless Ubuntu Torrent Home Server

So it got to that time of the year where I feel the itch to upgrade my aging home server. I assessed the situation and realized that, for what it does, my current server does not need any kind of hardware upgrade. So I just decided to rebuild it with Ubuntu 11.04 64 bit and change up the server software a bit to be more accessible to my wife as well as to be a bit more modern (torrentflux and derivatives have been dead for a while now).