I was waiting a long time to get my hands on one of these. Raspberry Pi is SBC (Single-Board Computer) with which you can do almost anything. Because of the pocket size of this full fledged computer you can use it as a web / mail / git server, cloud storage / NAS, seedbox, VPN, media center, SDR etc. and power all kinds of creative IoT projects. The beauty of the Pi lies in that it can be easily expanded with additional components such as sensors or even microcontrollers such as an Arduino.