Thanks for great work David! The article is unusually well written, and the animations is a great way of illustrating the different architectures. This is a topic where even otherwise knowlegdable people often seem totally ignorant, so I believe it is really needed.

What I do miss, and believe really should be covered, is the current multi-core architectures from Intel and AMD. Core 2 with it's shared cache for instance. Even though you did mention crossbar, I still believe the X2 also should be mentioned in particular.

Another issue is of course comparing to clusters with distibuted memory, and their ethernet based communication, but I understand if that broadens the scope too much.

Regards,
Brask