Well, you've pretty much nailed Node's strength on the head (at least in my opinion).
I only have 1 app in production on node, it's
http://pugbomb.me (and there's a link to github in the footer). Yeah, it's a dumb pug website. :)
I just went to NodeSummit this past week (scan through my tweets for notes from the conference, @adunkman). Walmart, LinkedIn, and Twillio have used Node to "front" REST-apis, and have seen significant performance improvements because of the evented nature of Node.
Do you program in JavaScript already?