Tony Arcieri rants on bad suggestions from Node.js folks. His catch phrase, "It gets worse". I love his conclusion:
Clearly the next logical steps are to store previously computed Fibonacci numbers in MongoDB. Or you could build a system with Socket.IO which caches previously computed Fibonacci numbers client-side using a distributed hash table. Then you'd be well on your way to a multimillion dollar cloud-based Fibonacci number service. Eventually you'll probably want to build in an OpenMP C++ native extension to calculate Fibonacci numbers across multiple CPU cores. That way you'll have a truly roflscale Fibonacci web service.
I run into this kind of thinking occassionally at work, but it is quickly tamped down before real money gets burned.