Node.js should have the potential to eat the same lunch as Mongrel2. Now that pre-forking is possible, node can do 6-10k http requests / sec per CPU core. That

Node.js should have the potential to eat the same lunch as Mongrel2. Now that pre-forking is possible, node can do 6-10k http requests / sec per CPU core. That leaves plenty of room for dispatching requests to any backends. And you get full flexibility of scripting everything in JS.