but...

it has to have an option to only keep the most recent(delete all old ones when downloading a new one, like iTunes does)

AND

be able to re-tag the Mp3s with 'Podcast' as the genre.


Any suggestions?

Doppler is really really nice, but it won't automatically delete the old ones like I want. You can limit it based on number of files, but that messes up the logo art that comes with them.