Router + HDD (Score 1)

I use an Asus WL500-W router with an attached 1TB USB drive. The router costs under $100 and uses 10 watts. You can install Linux on it by uploading new firmware (I use DD-WRT). It runs torrents at all times, with QoS during the day, as well as an nzb client. Apache and Samba are installed and my XP laptop has no issues talking to either of them.