Adding Refinery CMS into a main Spree application as a Rails engine - idea that all static pages managed by Refinery, for example to build all our footer pages
http://refinerycms.com/guides/with-an-existing-rails-app
Some useful info here but probably superseded by latest developments :
http://rohanmitchell.com/2012/04/spree-refinery-together-spreefinery/