First, this app rocks. Very nice. I like the fact that it integrates so well with iTunes, so I enabled auto-downloading. I come back from class, plug in my ipod, and everything syncs up because of the way I have my smart playlists setup. My major problem right now is that the app is downloading totally random podcasts that I have not ever subscribed to. Any clues? A couple other suggestions:
-- a database of podcasts, like NetNewsWire has in their 'sites' drawer'
-- force genre change in app preferences (it doesnt always change it to 'Podcast')
--better feed sorting in left bar

very very nice app!