Ruby/Rails/Mongrel/Pound does a great job of utilizing all those CPUs that I have in a production environment. There's a bunch of overhead, but it is easier th

Ruby/Rails/Mongrel/Pound does a great job of utilizing all those CPUs that I have in a production environment. There's a bunch of overhead, but it is easier than having to deal with locking. It really depends on your application, though. If it isn't a web application, and state matters, then you're going to have to go elsewhere.