I've searched around a little bit and can't find anything like this. Is there any podcast software for the Centro itself that will automatically log on and download any new podcasts from a feed at say 3am or something? And ultimately also auto-delete episodes once I've listened to them.

I'm getting sick of having to manage podcasts on my computer and having to hook up the Centro and manually transfer new files and delete ones I've heard. I've got an unlimited data plan. I intend to use it to its fullest extent.

Audible Air (Audible.com) does something like that, but only for their content -- books, magazines, New York Times, Wall Street Journal, etc..