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The Japan Times, who should really consider changing their motto from “All the news without fear or favour” to “The News, only two days late” has an excellent article on a wide range of Japanese educational podcasts sites targeted to both beginners and experts.
I also spotted an article at Lifehacker about putting Wikipedia on your iPod.
I might have to try one of these when I have some time.

Your link leads to Microsoft.com. I’m to sleepy to tell if that is some sort of biting social commentary or just a broken URL.
In any case, have you seen http://englishteachinginjapan.blogspot.com/
The guy who runs it has been teaching there for over 10 years and he seems to have a great relationship with his students. He set up the blog/podcast to give tips and answer the questions of others who are teaching English. It may be useful, maybe not.
Thanks for pointing that out – I corrected it now.