I came across this site while reading the Christian Science Monitor's Sci/Tech RSS feed. Here's an excerpt from "The friendship that changed painting":
You can read the entire article here.
After a brief Splash Page introduction (and a warning about file sizes), the Flash-based exhibition opens into a new window - with a rotating handful of paired paintings and an introduction to the site by Joachim Pissarro. (Curator of the exhibit and great-grandson of Camille.) Compared to the roughly 80 paintings in the physical exhibit, the website makes 48 "selected works" available for online perusal, accessible through three interactive -and interwoven- interfaces.
I will be sharing this site with a group of Art teachers I'll be working with tomorrow. I hope you'll show it to art lovers and teachers that you know.