> The major improvment that I'm trying to work towards is SMP/SMT support. 
> Squeak today is strictly single threaded...

Could this be done in a platform independent way?  I'm no expert with
concurrent thread programming, but my impression is that instances of Process
in Smalltalk are copmletely identical across platforms because they're just
internal objects, not OS threads.  This is nice for portability, so OS-Thread
support would be a different, *additional* thing available for use.  Is that right?