My friend, and HacDC cohort, Erica Kane, put together this wonderful set of automated LED stair lights together after seeing this post on MAKE. It is programmable to any user-defined light intervals and sequences. She has a post that provides the basic details of the build, with links to the Eagle files for the circuit, the Processing code, etc. She used the Arduino Mini Pro as the controller and the M5451 as the LED driver. Nice job, Erica!