I have only used Node.js a little bit so far, but I've been pleased. I'd say at this point it is great for JavaScript business logic. I'd hold off on using it f

I have only used Node.js a little bit so far, but I've been pleased. I'd say at this point it is great for JavaScript business logic. I'd hold off on using it for long running processes like caches or proxies (http server behind a load balancer would be fine, as those are cheap to restart.) Basically Node is solid but has the occasional hiccough. Also the libraries are rapidly evolving. Real life example: CouchOne hosting originally prototyped our proxy in Node.js before @_jhs moved it to Erlang. We still do business logic (async operations) in Node and it's great for that. In a few months it should be ready for prime time in the critical path as well.