Excellent news: someone has backed up Gonçalo L. Fonseca's History of Economic Thought website!
I'm still ploughing through Sraffa. I have some notes on Joan Robinson's Philosophy and Economics which I may post soon, too.
Until then, stay thirsty my friends!
The New School of Economics used to have a great website on the history of economic thought, which has been down for a while.
For my own reference, it's available on the internet archive.
Now...off to work!
: The entire website was saved as a pdf available online.
Someone may want to try to reconstruct the website based off of this pdf...
