I'm also in Mainland China and I also cannot access the podcasts. I'm pretty sure I was fine back in July or so, though I might have been in Hong Kong then, I can't remember very well.

The link doesn't really seem to work either for some strange reason... I normally shouldn't have a problem downloading an mp3 file; I doubt it's blocked since it didn't time out, today might just be a bad day for the internet. (Or maybe you moved the file)