I don't know what category this would fall under...maybe intermediate...but I would really like to see a series of shows on dialects like Osakaben etc. I know a bit already but it would be nice to see some formal lesson material. Maybe even get some guests in from other parts of Japan to introduce hyougen particular to their part of the country.
To get the lesson material started here are some interesting vocab you might want to introduce and explain:
akanakan
bochibochi
hen as a replacement for nai eg.... wakarahen
Maybe even a lesson on yakuzago.