Is there a way I can update (manage) podcasts on my iPhone4 from Ubuntu?
What I especially want to do is: - check if new episodes of podcasts are available - download new episodes
Use GPodder to manage your podcasts.
Depending on what sort of IPhone4 you have - use this Question to sync the downloaded podcasts.
HPodder is a command line tool to manage podcasts - if you couple this with a crontab entry, it will download your podcasts on any crontab schedule you setup