Record streaming audio to iPod directly / Record web radio to podcast format?

Does anybody know if there is software that will rip internet radio to podcast format? They blocked streaming audio at work, so what I would like to do is record my favorite internet radio station at home while I am at work, and save it as a podcast.

If it works the way I envision it, all I need to do is bring my iPod home every night and plug it in to automatically load the latest podcast. I like that because I wouldn't have to mess around with the itunes library or anything else. I think podcasts also let you put a limit on how many editions it keeps as well, so there would be automatic housecleaning, too. I'll always be a day behind but at least I will have something to listen to.

I really liked the idea behind the iFill software, but it looks like Griffin discontinued it. That's a shame. Anyhow, thanks in advance for any assistance.

-Brian