I have not organized myself to getting it into iTunes yet, but I think you can import http://www.kalzumeus.com/category/podcasts/feed/ and that will work. (Worked for me, but can't read you the buttons you have to push since they're in Japanese. Alt-A, P, copy/paste?)
Shortly after commenting I fell down on the iTunes bit (couldn't sort out importing that feed), and ended up using the mp3s. Would be awesome if you got the podcast incorporated into iTunes eventually. Until then I'll use google reader to keep up to date.
