I have started a portal at Portal: SmalltalkProlog initially to explore such things as Prolog in Smalltalk/X and Squeak and the current state of Roel Wuyt’s SOUL in VisualWorks.
Prolog evolved on one branch, if you will, to PDC Visual Prolog and Mercury in much the same way as Smalltalk begat Strongtalk. In some ways, Mercury begat oz/Mozart. Or in the niche in which Mercury has not thrived, oz/Mozart might yet thrive.
Affinities of Strongtalk and Mercury are what I have planned for the menu next. Add a pinch of salt if you partake.
If you have used rules within Smalltalk in a project which can be discussed on a public forum, please do contribute. If you have a related site, please visit aboutus.org