Hi

I found the following work interesting. May be someone would like to 
play with it?
This is not in Squeak.

http://users.info.unicaen.fr/~karczma/Work/Clastic_distr/clastic.html

From: http://srfi.schemers.org/srfi-25/mail-archive/msg00069.html

Stef



Dr. Stéphane DUCASSE (ducasse at iam.unibe.ch) 
http://www.iam.unibe.ch/~ducasse/
  "if you knew today was your last day on earth, what would you do
  different? ... especially if, by doing something different, today
  might not be your last day on earth" Calvin&Hobbes