I made a simple library for Processing that streams and parses live sleep data from the bedside display, and lets you import and parse your exported "zeodata.csv" files. It provides a few functions to compute average values of your sleep data variables.
http://www.evsc.net/tech/zeolibrary
http://code.google.com/p/zeolibrary
Anyone who is familiar with Processing (easy Java IDE) can start playing with their data.