I don’t think Fork CMS is very well known outside Belgium (it is being developed by a Belgian web development agency, Netlash), but it’s actually starting to get more popular here. We’re seeing several new deployments of Fork CMS “in the wild”.
That’s what prompted me to make a Varnish “template” to handle the caching of a Fork CMS. I’ve pushed the code to my github repository, Varnish 3.0 Configuration Templates.
For now, since a PHP Session ID is generated at every page request, I’m making all pages “static” except the /private and /backend pages that require a login. If you’ve got any recommendations, I’ll gladly hear of them!