Seamlessly sync podcasts btw multiple Android Devices and Computers?

Problem (brief): I want to seamlessly sync my podcast subscriptions between multiple platforms.

my home desktop (Mac OS X 10.7)

work desktop (Mac OS X 10.7)

Android Phone (HTC Sensation ICS)

Android Tablet (Samsung Galaxy Tab 2 10.1 ICS)

I listen to podcasts at work, on the train and in my car and I haven't found a way to sync it across all my computers/devices. Currently I have to put different subscriptions on different devices to ensure I don't listen to the same thing twice.

I tried using doubletwist, Google Listen, Google Music. Each with their own problems. I guess I'm looking for something that provides a process as seamless as syncing between iTunes and iPhone.

Any suggestions?