What I am missing is a robust solution for keeping my feeds (blogs, podcasts etc) in sync between multiple devices, using a standardised protocol that enables t

What I am missing is a robust solution for keeping my feeds (blogs, podcasts etc) in sync between multiple devices, using a standardised protocol that enables the usage of many different clients on any platform. There has been some attempts on tackling this problem, but none have managed to get it right and become truly universal, as far as I know.