Vemedio just released a public beta of its Instacast for Mac app. Now that I think about it, a podfeeder for the Mac (syncing with my phone) makes a lot of sense. I'd no longer have to set the phone down next to my Mac (or fiddle with unsynced web versions) to listen to podcasts. If they get syncing right, they are on to something.
I have to admit feeling a little snake bit by Instacast though. I've paid for it several times with their various upgrades and I prefer DownCast on my phone. Nevertheless, syncing to my Mac may be enough to bring me back into the fold.