Any chance you could add JEE6?
The two major JSF 2.1 implementations MyFaces and Mojarra are both missing. I don't expect awesome performance numbers, but since JSF2.1 is the 'official' (sigh) web framework of JEE6, it would be interesting how awful they are compared to some of these other languages.
I guess though if this is only testing JSON serialization, it may not make sense. Perhaps adding JAX-RS implementations like CXF, Jersey, RESTEasy, and RESTLet would be more appropriate.
The latest test that we have, dubbed "Fortunes", does server-side templating, so we (or a generous community member) could add a JSF implementation for that test.
I guess though if this is only testing JSON serialization, it may not make sense. Perhaps adding JAX-RS implementations like CXF, Jersey, RESTEasy, and RESTLet would be more appropriate.