As mention I have been working on the VM api documentation, but today  
I spent some time  working on the Objective-C bridge documentation

http://isqueak.org/ObjectiveC

As previously mentioned an OS-X plugin can be found at ftp://ftp.smalltalkconsulting.com/experimental/
and with the code from http://www.squeaksource.com/ObjectiveCBridge2
you can create and work with Objective-C objects from within your OS-X  
based image & VM

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John M. McIntosh <johnmci at smalltalkconsulting.com>
Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
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