I'm not actually a "Smalltalk fan", but I recently re-implemented the Smalltalk-80 virtual machine and some additional tools to analyze the original Smalltalk-80 sources and virtual image files. My goal is to run it on LuaJIT and compare the performance with other Smalltalk implementations. See https://github.com/rochus-keller/Smalltalk. I'm also working on a Simula 67 compiler, and a Golang to LuaJIT bytecode compiler is also on my list. As you can see I write everything in C++, which also says something.
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Cool. If I had a few free weekends I'd want to make that Smalltalk image run on my SqueakJS VM. One of theses days ...
Have a look at http://www.squeaksource.com/Hobbes/, but don't expect impressive performance. It's not the code in the Bluebook part 4 though. If you want to implement it yourself be prepared that it might take many weekends until it runs as expected; debugging Bluebook errors took many hours.