Etsy (http://www.readwriteweb.com/hack/2011/02/how-etsy-is-using-nodejs.php http://www.readwriteweb.com/hack/2011/02/how-etsy-is-using-n...) Yammer (http://bos

Etsy (http://www.readwriteweb.com/hack/2011/02/how-etsy-is-using-nodejs.php http://www.readwriteweb.com/hack/2011/02/how-etsy-is-using-n...) Yammer (http://bostinnovation.com/2011/01/15/who-is-using-node-js-and-why-yammer-bocoup-proxlet-and-yahoo/ http://bostinnovation.com/2011/01/15/who-is-using-node-js-an...) Gilt Groupe (real-time analytics using http://projects.nuttnet.net/hummingbird/ http://projects.nuttnet.net/hummingbird/) Lanyrd uses Node.js for Twitter stream, I think? Yahoo! is experimenting with Node.js as well (see Yammer link) The list goes on, but that's all I can remember off the top of my head.