In my work at the Teacher Learning Network I have helped develop and setup the hosting services for the TLN podcasts. This includes having the TLN podcasts listed in the six largest podcast directories.
DJCEducation will give you the option of having multiple channels.
If you would like to get your podcast online.
Once you are up and running if you decide you find another service that suits your needs better then take your files with you without any penalty or exit fees.
Contact me for a quote