Podcasts

I'm still looking for the holy grail of podcasting; software that will fetch my daily audio podcasts and put them in a sync directory. On top of this I want it to be able to download video podcasts and automatically convert them to the correct format ready to be synced with the Nokia N800. And to make matters worse, I want the N800 to 'wake up' at a predetermined time and sync with this said directory!

Is this too much to ask?