I built a node.js social networking web site for noders but I get some serious problems to improve my SEO factors. How can I make it SEO friendly? And yes, given that it is a single page app, it is a little harder!
I've toyed around with this before. A good place to start is…
http://backbonetutorials.com/seo-for-single-page-apps/
There are also services and libraries for node that will render your app server side in phantom (or the like) and serve it to the bots.