The data for all of the non assessed exercises that form part of module 4, GIS and Spatial Analysis is available for download as a zipped archive from:
https://dl.dropbox.com/u/11088638/Module%204%20Data%20Package.zip.
The archive contains folders with data for each numbered exercise.
I'll be adding further details of and links to some of the software we will be exploring as part of this module shortly.