I just released StripInvaders, my Arduino (Ethernet) based LED Strip (ws2801) driver. I use the Grove base kit to connect my led strips. Some features:
-Bonjour and mDNS support
-15 different color modes
-Control StripInvaders with a Smartphone or Tablet
-Stepless adjust the RGB value and the animation delay
-All fits into the 30kb firmware
I published the sources on neophob.com/2011/12/stripinvaders-light-system/.