Here is a challenge:�� What is "Smalltalk"?
VAST, VW, and Pharo are quite different environments.
To the extent that they share a common syntax (which
they don't, quite), fine, but porting nontrivial
code between them is NOT easy.�� They certainly have
very little in common as GUI kits.�� All praise and
thanks to the people who *have* ported stuff.