Saw this on comp.lang.smalltalk.
Vmx is a multi-language scripting engine for the Microsoft .Net framework.
A Beta version of Vmx Smalltalk is now available for download.
I downloaded it and quickly played with it for all of 2 minutes. It actually maps the Smalltalk objects to their .NET types. I'm not really sure what that means in regards to overiding binary operations and such, but it is interesting anyway. It's supposed to be a scripting platform, and it could well be a neat one.