Here is my real first project with a arduino, it's stil at prototype/poc fase but it's working so far. I'ts a Arduino with a custom made DS1307 shiel and 60 RGB leds. This one was inspired by the clock Bram Knaapen made. Altough the design an hardware is different.
For full sources, schema, video and some instructions look at my blog post http://blog.kruyt.org/archives/22