This looks like an interesting project: JavaConnect:

JavaConnect is a Visualworks Smalltalk library that allows a seamless interaction between Smalltalk and Java. A Smalltalk application can access any Java object and send messages to it, just as if it were a Smalltalk object. Its implementation relies on a connection between the Smalltalk environment and a standard Java VM environment using Visualworks' DLLCC and Java's JNI. The Java application thus executes on a regular Java VM and the Smalltalk application executes on the regular Smalltalk VM.

Looks very impressive - I'll have to download it and give it a whirl.

Technorati Tags: java