This is a fantastic, unique project which uses RFID tagged pictures to select and play album. The system utilizes the easy to use arduino microcontroller platform along with an RFID reader and is also ethernet enabled. See more pics and details:
When a tag (album picture) is placed over the tag, a signal is processed by the arduino and sent over ethernet to a database. This database then looks up the tag and matches it with the corresponding album and begins to play the selected music.
The author has posted a nice write up for the Arduino mp3 build on his site where he goes into further detail about the project specs. Check out our entire database of audio and arduino projects for your next build and project inspiration.