A new version of gPodder (2.0; "Day of the Tentacle") was released a few days ago, and it has already landed in Extras for both Chinook and Diablo. I wrote about the Maemo 4 UI changes some weeks ago, and you can enjoy them all on your tablets right now.
The podcast directory (which allows you to discover new podcasts) which looked ugly previously has also been "Fremantleized", and is very usable now:
I'm still thinking about the best way to implement indicators for new, downloaded and listened episodes, but at least the GtkPaned-based split view is gone now:
The episode list is also quite unspectacular, but you can use the AppMenu to unsubscribe from the podcast (splitting up the UI in so many views automatically makes the AppMenus not so filled - good move!).
You can find some more screenshots depicting the current status of the UI in this Flickr photoset, and expect a new release next week or so.