VM background reading "porting squeak"

Just sharing that I found the following chapter from Mark Guzdial's
"Squeak: Open Personal Computing and Multimedia" an interesting
background read on the VM. Cross posting since some others not on
[vm-dev] might similarly find it interesting.

http://sdmeta.gforge.inria.fr/FreeBooks/CollectiveNBlueBook/porting-subfinal%202.pdf

cheers -ben