How to sync podcasts between multiple computers

I'd like to be able to keep my podcasts in sync (last played position, downloads, subscriptions) between my home Macbook, my work Macbook, and my iPhone 5. Any suggestions of how to do so? It would seem the two computers need to share the same iTunes library database file, which could perhaps be done via Dropbox? But I don't need all my music to be shared between the two computers (and don't want the library on Dropbox).