We're building a small-ish site now with Backbone where we do something similar with PhantomJS. In our `grunt build` task, phantomjs saves static versions of subpages. Each of those pages loads up the same backbone app, but the user (and search engine) sees the content they would expect to see no matter where they land – without waiting for Backbone to load and run through it's router. And it didn't take much time to setup.

Progressive enhancement is "The Right Way", for sure, but there are some projects where we just aren't concerned with targeting users without Javascript. That said, hopefully this will let us cater to many of those users, reap the SEO benefits, and provide a better first-landing experience for those not hitting the home page.

Edit: This is the grunt plugin we are using for this: https://github.com/cburgdorf/grunt-html-snapshot