How can I synchronize podcasts using Ubuntu One?

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http://askubuntu.com – I use Rhythmbox's podcast feature, to automatically download new podcast episodes from feeds which I've subscribed to. I also happen to use Ubuntu on several computers, all synced to the same Ubuntu One account. What I want to do, is to synchronize downloaded podcasts as well as Rhythmbox's list of podcast subscriptions between my computers, so that the podcast view in Rhythmbox appear the same on all computers. How can I do that? (HowTos)