Rhythmbox podcasts multiple desktop machines

[Bob <spam@homeurl.co.uk>]

Hi, for various reasons I have multiple desktops around the house, (my 
main desktop and 2 HTPCs)
I don't login to all the machines as the same user and I subscribe to 
quite a few podcasts in Rhythmbox.

What I'm trying to achieve is for the subscriptions, downloaded files 
and preferably things like the play count to sync up.

Can anyone think of a way to do this?

Thanks for any help.