I have re-coded the RE:Lay script so that it runs as an AddOn now. I am abandoning the previous version, which was just a script that ran in a frame_change event.
This new version can relay animated parameters from array based datablock values, such as colors and coordinates, as well as single floats or ints like extrude, specular intensity and so on. The script now relays material values as well. This works for Blender Internal and Cycles based materials.
I have put together a short video tutorial to demonstrate how to use the AddOn and the new features.