That's the name of project Gary (senior lecturer at U of T) was talking about at the last meet up. Here's a sample of it: http://www.cs.toronto.edu/~gfb/projects/richer-language-extension/spite.scm It can turn: (= the_world_is_flat 1) (if the_world_is_flat ((print "Be careful not to fall off!"))) into: the_world_is_flat = 1 if the_world_is_flat : print "Be careful not to fall off!" That's just a quick and dirty sample apparently. It will be interesting to see a lengthier example whenever that's posted up. -Rudolf