Cartoon Modern is Amid Amidi's blog which accompanies his forthcoming book of the same name, Cartoon Modern: Style and Design in Fifties Animation.
Good stuff. Here, for example, he talks about how inexperience and an inability to collaborate with other animators undercut art director Evyind Earle's contributions on Sleeping Beauty.
There's a lot more, and I expect the book will be gorgeous.
Cartoon Modern, via Amidi's all-animation blog, Cartoon Brew.