Thought I read a post from you about issues with the RSS feed. Did you get that worked out? Here are the links to all of the site RSS feeds:

The public feed:

http://popupchinese.com/feeds

Your custom lesson RSS feed:

http://popupchinese.com/feeds/custom/[username]*

Interestingly, this gives us the ability to push out custom feeds on a show-by-show basis:

http://popupchinese.com/feeds/custom/intermediate

http://popupchinese.com/feeds/custom/film-friday

The comments RSS feed is here:

http://popupchinese.com/feeds/community

* note for shows to appear on your personal feed you need to subscribe and unsubscribe to the ones you want on your profile page. And iTunes only displays content with attached MP3 files, so the HSK stuff won't show up on iTunes by default. Google Reader shows everything.