- - costs me, energy-wise, only about 3-3.5W
- - is always accessible even though I have a dynamic IP (via free DNS providers)
- - has a Lighttpd web server so I can share things with the world
- - has an Exim mail server, so I can receive mail over (E)SMTP, store it in my house, and read it over SSH/mutt
- - can be SSH-ed into, which allows me to Wake-On-LAN my main desktop, whenever I need access to it
- r- uns long running web downloads (e.g. wget/rtorrent) from within screen-ed sessions, and shares them over Samba to my house-bound devices (e.g. watch movies from my Android tablet)
- - SSH is exposed over sslh in my HTTPS port (bypassing several firewall limitations in various places - cough, work, cough) etc.
It also required soldering to access the board's serial port - all in all, very useful tinkering