If you have been looking for a small stereo audio playback system for use in home automation or pretty much for anything you should check out the Sd-10 by Gilderfluke & Co. This miniature stereo Mp3 and .wav AudioFile player holds up to 255 AudioFiles on MMC or SD flash cards and includes RCA line level outputs, two trigger inputs and TTL serial port. Five operating modes. It can be used in Store-Casting, Music-On-Hold, Museum, Haunted Attraction, Safety, Industrial or Entertainment applications. Anywhere you need a solid state, high quality audio system that will play for years. The Sd-10 can be dropped right into an audio system in place of a CD player.
You should also check out some of their other cool gadgets!