By reader request, I have written mini-reviews for five Japanese podcasts, some of which will help you for the JLPT, and some of which are just fun and can help with your conversational Japanese. You can find the update here-

http://www.nihongoperapera.com/itunes-japanese-podcasts.html

Soon, I will add a review of the Casio EXWord that I recently purchased, but in the meantime, you are welcome to suggest content addtions here-
http://www.nihongoperapera.com/contact

Cheers,
Kaeru