CherryPy, in combination with oursql (+DBUtils to make it multithread safe because libmysql.so isn't). Caching is done by memcached (plus, I must look into Varn

CherryPy, in combination with oursql (+DBUtils to make it multithread safe because libmysql.so isn't). Caching is done by memcached (plus, I must look into Varnish). Templating by HTMLTemplate. I made two small patches to CherryPy to make it more agreeable for a site which serves 900 domain names (using the VirtualHost dispatcher).