Awesomely enough, the project is open source, buy the complete kit, SD card only, or download the source code here. This little projection installation tool houses a feature set similar to that of some high end media servers.
Unlike the MiniMad, the PocketVJ is fully customizable, open-source, preloaded presentation mode, video player, date/time schedule for self management, web interface for remote control, video-wall feature, syncable player setup, and screen sharing through VNC. With TCPSyphon you can send your video files directly from your computer to the player (with a little bit of latency based on connection). You can even have the PocketVJ auto power up and down your projector via the RJ45 jack. It is less intuitive than the MiniMad, but has a much more robust feature set and is 100% standalone.