Some links to other sites about diecasts. I will be adding to this and welcome suggestions in comments.
Lamley Group Blog (great information about Matchbox and Hot Wheels)
Nicolas Forget’s diecast cars (French site) for Norev
Joel Reyes Noche (a Filipino blogger with a section on scale models)
The Race Case Marc Bosworth blogs about his diecast collection
Jasmine’s Garage features and reviews of 1:64/3-inch scale diecast cars