I was playing with MaxScript, trying to see how I can rewrite the .mel ca script and at the end I came up with a much more elaborate version for 3ds max, that implements 18 different sets of rules.
CA are quite critical for what I am researching right now (self-organization that is...). It is really impressive how different classes of rules produce different results, from quickly normalized ones to totally chaotic (rule 30).
The script is available for downloading at the tools section.