We @sc5io decided to release our own research regarding this very same issue.

I love the Rendr approach, yet we feel that our backbone-serverside framework provides an even more flexible way to tackle the same issue.

Read more at SC5 blog (http://blog.sc5.fi/2013/04/serving-backbone-for-robots-legac...) or at the Mozilla Hacks article: https://hacks.mozilla.org/2013/04/serving-backbone-for-robot...